PROFIBUS with STEP 7 V13
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SIMATIC
PROFIBUS
PROFIBUS with STEP 7 V13
Function Manual
12/2014
A5E03775446-AC
Preface
Documentation guide
1
Description
2
Parameter
assignment/addressing
3
Diagnostics
4
Functions
5
Service & Support
A
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E03775446-AC
12/2014 Subject to change
Copyright © Siemens AG 2013 - 2014.
All rights reserved
Legal information
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DANGER
indicates that death or severe personal injury
will
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WARNING
indicates that death or severe personal injury
may
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CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
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The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
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Note the following:
WARNING
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Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 3
Purpose of the manual
This function manual provides an overview of the PROFIBUS communication system with
SIMATIC STEP 7 V13.
STEP 7 V13 is integrated into the powerful graphic Totally Integrated Automation Portal
(TIA Portal), the new integration platform for all automation software tools.
This function manual supports you in planning a PROFIBUS system. The manual is
structured into the following subject areas:
PROFIBUS basics
PROFIBUS diagnostics
PROFIBUS functions
Basic knowledge required
The following knowledge is required in order to understand the manual:
General knowledge of automation technology
Knowledge of the industrial automation system SIMATIC
Knowledge about the use of Windows-based computers
Proficiency with STEP 7
Scope
This function manual is the basic documentation for all SIMATIC products from the
PROFIBUS environment. The product documentation is based on this documentation.
The examples are based on the functionality of the S7-1500 automation system.
Changes compared to previous version
As compared to the previous version (version 07/2014), this manual contains the following
amendments/changes:
Extension of the documentation to STEP 7 (TIA Portal) V13 SP1
Addition of the function Intelligent DP slaves (I-slaves)
New guide
Preface
PROFIBUS with STEP 7 V13
4 Function Manual, 12/2014, A5E03775446-AC
Conventions
STEP 7
: We refer to "STEP 7" in this documentation as a synonym for the configuration and
programming software "STEP 7 as of V12 (TIA Portal)" and subsequent versions.
This documentation contains figures of the devices described. The figures may differ slightly
from the device supplied.
You should also pay particular attention to notes such as the one shown below:
Note
A note contains important information on the product described in the documentation, on the
handling of the product or on the section of the documentation to which particular attention
should be paid.
Additional support
You will find information about available technical support in the appendix Service & Support
(Page 91).
The technical documentation for the individual SIMATIC products and systems is available
on the Internet (http://www.siemens.com/simatic-tech-doku-portal).
The online catalog and the ordering system are available on the Internet
(http://mall.industry.siemens.com).
Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, solutions, machines, equipment and/or networks. They are
important components in a holistic industrial security concept. With this in mind, Siemens’
products and solutions undergo continuous development. Siemens recommends strongly
that you regularly check for product updates.
For the secure operation of Siemens products and solutions, it is necessary to take suitable
preventive action (e.g. cell protection concept) and integrate each component into a holistic,
state-of-the-art industrial security concept. Third-party products that may be in use should
also be considered. You can find more information about industrial security on the Internet
(http://www.siemens.com/industrialsecurity).
To stay informed about product updates as they occur, sign up for a product-specific
newsletter. You can find more information on the Internet
(http://support.automation.siemens.com).
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 5
Preface ................................................................................................................................................... 3
1 Documentation guide .............................................................................................................................. 7
2 Description ............................................................................................................................................ 10
2.1 Introduction to PROFIBUS ...................................................................................................... 10
2.1.1 Applications of PROFIBUS DP ............................................................................................... 11
2.1.2 PROFIBUS terminology .......................................................................................................... 12
2.1.3 PROFIBUS DP interface ......................................................................................................... 16
2.2 Structure of PROFIBUS networks .......................................................................................... 17
2.2.1 Passive network components for RS 485 networks ............................................................... 19
2.2.1.1 RS 485 cables ......................................................................................................................... 19
2.2.1.2 PROFIBUS FastConnect system ............................................................................................ 20
2.2.1.3 PROFIBUS bus connector ...................................................................................................... 22
2.2.1.4 M12 bus connector ................................................................................................................. 24
2.2.1.5 Bus terminals for RS 485 networks ........................................................................................ 24
2.2.1.6 M12 bus terminating resistor .................................................................................................. 24
2.2.2 Passive components for optical networks............................................................................... 25
2.2.2.1 Fiber-optic cables .................................................................................................................... 25
2.2.2.2 Plastic and PCF fiber-optic cables .......................................................................................... 26
2.2.2.3 Glass fiber-optic cables........................................................................................................... 27
2.2.3 Active network components .................................................................................................... 29
2.2.3.1 Network components in electrical networks............................................................................ 29
2.2.3.2 Network components in optical networks ............................................................................... 33
2.2.4 Examples for topology ............................................................................................................ 35
2.2.4.1 Topology with RS485 repeater ............................................................................................... 35
2.2.4.2 Topology with diagnostic repeater .......................................................................................... 37
2.2.4.3 OLM topology .......................................................................................................................... 40
2.2.4.4 WLAN topology ....................................................................................................................... 40
2.2.4.5 Connecting PROFIBUS to PROFINET ................................................................................... 41
3 Parameter assignment/addressing ........................................................................................................ 42
3.1 Assigning the DP slave to a DP master .................................................................................. 43
3.2 PROFIBUS address ................................................................................................................ 45
3.3 Network settings ..................................................................................................................... 46
3.4 Cable configuration ................................................................................................................. 49
3.5 Additional network stations ..................................................................................................... 51
3.6 Bus parameters ....................................................................................................................... 52
3.7 Constant bus cycle time .......................................................................................................... 55
Table of contents
PROFIBUS with STEP 7 V13
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4 Diagnostics ........................................................................................................................................... 57
4.1 Overview ................................................................................................................................ 57
4.2 Diagnostics using the display of the S7-1500 ........................................................................ 58
4.3 Diagnostics with the diagnostic repeater ............................................................................... 60
4.4 I&M data (Identification and Maintenance) ............................................................................ 61
5 Functions .............................................................................................................................................. 62
5.1 Isochronous mode ................................................................................................................. 62
5.1.1 What is isochronous mode? ................................................................................................... 62
5.1.2 Use of isochronous mode ...................................................................................................... 63
5.1.3 Isochronous applications ....................................................................................................... 64
5.1.4 Sequence of synchronization ................................................................................................. 65
5.1.5 Requirements for configuration .............................................................................................. 66
5.1.6 Configuring isochronous mode .............................................................................................. 67
5.1.7 Diagnostics and interrupt functions ........................................................................................ 70
5.1.8 Parameter settings for isochronous mode ............................................................................. 71
5.1.8.1 Viewing isochronous mode parameters ................................................................................. 71
5.1.8.2 Change parameters ............................................................................................................... 72
5.2 Acyclical data exchange ........................................................................................................ 74
5.3 SYNC/FREEZE groups .......................................................................................................... 75
5.4 Interrupts ................................................................................................................................ 77
5.5 Intelligent DP slaves (I-slaves) ............................................................................................... 78
5.5.1 I-slave functionality ................................................................................................................ 78
5.5.2 Data exchange with higher-level DP master .......................................................................... 81
5.5.3 Configuring an I-slave ............................................................................................................ 82
5.5.4 Configuring transfer areas ..................................................................................................... 84
5.5.5 Sample program..................................................................................................................... 85
5.5.6 Diagnostics and interrupt behavior ........................................................................................ 89
A Service & Support ................................................................................................................................. 91
Glossary ............................................................................................................................................... 94
Index .................................................................................................................................................... 99
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 7
1
The documentation for the SIMATIC S7-1500 automation system and the SIMATIC
ET 200MP, ET 200SP and ET 200AL distributed I/O systems is divided into three areas.
This division allows you easier access to the specific information you require.
Basic information
System manuals and Getting Started describe in detail the configuration, installation, wiring
and commissioning of the SIMATIC S7-1500, ET 200MP, ET 200SP and ET 200AL systems.
The STEP 7 online help supports you in the configuration and programming.
Device information
Product manuals contain a compact description of the module-specific information, such as
properties, terminal diagrams, characteristics and technical specifications.
General information
The function manuals contain detailed descriptions on general topics such as diagnostics,
communication, Motion Control, Web server.
You can download the documentation free of charge from the Internet
(http://w3.siemens.com/mcms/industrial-automation-systems-simatic/en/manual-
overview/Pages/Default.aspx).
Changes and additions to the manuals are documented in product information sheets.
Documentation guide
PROFIBUS with STEP 7 V13
8 Function Manual, 12/2014, A5E03775446-AC
Manual Collections
The Manual Collections contain the complete documentation of the systems put together in
one file.
You will find the Manual Collections on the Internet:
S7-1500/ET 200MP (http://support.automation.siemens.com/WW/view/en/86140384)
ET 200SP (http://support.automation.siemens.com/WW/view/en/84133942)
ET 200AL (http://support.automation.siemens.com/WW/view/en/95242965)
My Documentation Manager
The My Documentation Manager is used to combine entire manuals or only parts of these to
your own manual.
You can export the manual as PDF file or in a format that can be edited later.
You can find the My Documentation Manager on the Internet
(http://support.automation.siemens.com/WW/view/en/38715968).
Applications & Tools
Applications & Tools supports you with various tools and examples for solving your
automation tasks. Solutions are shown in interplay with multiple components in the system -
separated from the focus in individual products.
You can find Applications & Tools on the Internet
(http://support.automation.siemens.com/WW/view/en/20208582).
CAx Download Manager
The CAx Download Manager is used to access the current product data for your CAx or CAe
systems.
You configure your own download package with a few clicks.
In doing so you can select:
Product images, 2D dimension drawings, 3D models, internal circuit diagrams, EPLAN
macro files
Manuals, characteristics, operating manuals, certificates
Product master data
You can find the CAx Download Manager on the Internet
(http://support.automation.siemens.com/WW/view/en/42455541).
Documentation guide
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 9
TIA Selection Tool
With the TIA Selection Tool, you can select, configure and order devices for Totally
Integrated Automation (TIA).
This tool is the successor of the SIMATIC Selection Tool and combines the known
configurators for automation technology into one tool.
With the TIA Selection Tool, you can generate a complete order list from your product
selection or product configuration.
You can find the TIA Selection Tool on the Internet
(http://w3.siemens.com/mcms/topics/en/simatic/tia-selection-tool).
PROFIBUS with STEP 7 V13
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Description
2
2.1
Introduction to PROFIBUS
What is PROFIBUS?
PROFIBUS is a bus system that networks automation systems and field devices that are
compatible with PROFIBUS. As communication medium for the field level, PROFIBUS is an
important part of Totally Integrated Automation (TIA).
The different communication networks can be used independent of one another or they can
be combined with each other.
PROFIBUS protocols
PROFIBUS DP
(distributed I/O) is a communication network for the field level according to
IEC 61158-2 / EN 61158-2 with the hybrid access protocols token bus and master-slave. The
networking takes place by means of two-wire lines or fiber-optic cables. Data transmission
rates of 9.6 kbps to 12 Mbps are possible.
PROFIBUS PA
is the PROFIBUS for process automation (PA). It connects the
PROFIBUS DP communication protocol with the MBP (Manchester Bus Powered)
transmission technology to IEC 61158-2.
PROFIBUS PA networks can be designed based on shielded, twisted two-wire lines
intrinsically safe and are therefore suitable for hazardous areas (Ex zones 0 and 1). The data
transmission rate is 31.25 kbps.
Description
2.1 Introduction to PROFIBUS
PROFIBUS with STEP 7 V13
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2.1.1
Applications of PROFIBUS DP
Introduction
The efficiency of control systems is not determined by automation devices alone, but
depends to a large extent on the overall configuration of an automation solution. This
includes a powerful communication system in addition to plant visualization and operator
control and monitoring.
The STEP 7 engineering tool supports you during the engineering and configuration of an
automation solution.
Applications of PROFIBUS DP
The PROFIBUS network offers wireless connection of several controllers, components and
subnets as electrical network, optical network or by using links. Sensors and actuators are
controlled centrally by means of PROFIBUS DP.
The following figure shows connection options to PROFIBUS DP:
Figure 2-1 Connection options to PROFIBUS DP
Description
2.1 Introduction to PROFIBUS
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Objectives of PROFIBUS DP
Distributed automation systems are increasingly used in production and process automation.
This means a complex control task is divided up into smaller, more transparent subtasks with
distributed control systems. This creates a high demand for communication between the
distributed systems.
Distributed systems offer the following benefits:
Independent and simultaneous commissioning of individual devices is possible
Small, manageable programs
Parallel processing due to distributed automation systems
Reduced response times
Higher-level structures can take on additional diagnostics and logging functions.
Increased plant availability because the rest of the overall system can continue to work
when a subordinate station fails.
2.1.2
PROFIBUS terminology
Definition: Devices in the PROFIBUS environment
In the PROFIBUS environment, "device" is the generic term for:
Automation systems (for example, PLC, PC)
Distributed I/O systems
Field devices (for example, hydraulic devices, pneumatic devices)
Active network components (e.g., diagnostic repeater, optical link module)
Gateways to AS interface or other fieldbus systems
Description
2.1 Introduction to PROFIBUS
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 13
Devices with PROFIBUS DP
The figure below shows the most important components with PROFIBUS DP. The table
below lists the designations of the individual components.
Number
PROFIBUS
Note
DP master system
DP master Device used to address the connected DP slaves. The DP master
exchanges input and output signals with field devices.
The DP master is often the controller on which the automation
program runs.
PG/PC PG/PC/HMI device for commissioning and diagnostics
DP master of class 2
PROFIBUS
Network infrastructure
HMI
Device for operating and monitoring functions
DP slave Distributed field device assigned to the DP master, e.g., valve
terminals, frequency converters.
I-slave
Intelligent DP slave
Figure 2-2 Devices with PROFIBUS
Description
2.1 Introduction to PROFIBUS
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Overview of I/O communication
I/O communication is the reading or writing of inputs/outputs of the distributed I/O. The figure
below gives you an overview of I/O communication using PROFIBUS DP:
Figure 2-3 I/O communication using PROFIBUS DP
I/O communication is also available with the communication module (CM) or the interface
module (IM) with integrated DP interface. These DP interfaces behave like integrated DP
interfaces of the CPU.
Description
2.1 Introduction to PROFIBUS
PROFIBUS with STEP 7 V13
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I/O communication using PROFIBUS DP
Table 2- 1 I/O communication using PROFIBUS DP
Communication between …
Explanation
DP master and DP slave The data exchange between a DP master and DP slaves with I/O modules takes place as
follows: The DP master queries the DP slaves of its master system one after the other,
receives input values from the DP slaves, and transmits output data to the DP slaves
(master-slave principle).
DP master and I-slave A fixed amount of data is transmitted cyclically between the user programs in CPUs of DP
masters and I-slaves.
The DP master does not access the I/O modules of the I-slave, but instead accesses
configured address areas, called transfer areas, that can be inside or outside the process
image of the I-slave CPU. If parts of the process image are used as transfer areas, these
may not be used for actual I/O modules.
Data transmission takes place with load and transfer operations using the process image or
by direct access.
DP master and DP master A fixed amount of data is transmitted cyclically between the user programs in CPUs of DP
masters. A DP/DP coupler is required as additional hardware.
The DP masters mutually access configured address areas, called transfer areas, inside or
outside the process image of the CPUs. If parts of the process image are used as transfer
areas, these may not be used for actual I/O modules.
Data transmission takes place with load and transfer operations using the process image or
by direct access.
Additional information
You can find additional information on the hardware configuration in the STEP 7 online help.
Description
2.1 Introduction to PROFIBUS
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2.1.3
PROFIBUS DP interface
Properties
A PROFIBUS device has at least one PROFIBUS interface with an electrical (RS 485)
interface or optical (Polymer Optical Fiber, POF) interface.
Table 2- 2 Properties of the PROFIBUS DP interface
Standard PROFIBUS: IEC 61158/61784
Physical bus/media PROFIBUS cables (twisted two-wire lines RS 485 or
fiber-optic cables)
Transmission rate 9.6 kbps to 12 Mbps
Representation of the PROFIBUS DP interface in STEP 7
In the device view of STEP 7, the PROFIBUS DP interfaces for a DP master and a DP slave
are highlighted by a purple rectangle:
Figure 2-4 PROFIBUS DP interfaces
Description
2.2 Structure of PROFIBUS networks
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2.2
Structure of PROFIBUS networks
Contents of this chapter
The following chapter provides background information on building your communication
network.
Overview of the most important passive network components: These are network
components that forward a signal without the possibility of actively influencing it, for
example, cables, connectors.
Overview of the most important active network components: These are network
components that actively affect a signal, for example, repeaters, diagnostic repeaters.
Overview of the most common network structures (topologies)
Physical connections of industrial networks
PROFIBUS devices can be networked in industrial plants in two different physical ways:
By means of electrical signals via copper cables
By means of optical signals via fiber-optic cables
Description
2.2 Structure of PROFIBUS networks
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Selection criteria for networking
The table below includes selection criteria for electrical and optical networking of PROFIBUS
devices:
Table 2- 3 Selection criteria for electrical and optical networking
Criteria
Electrical
PROFIBUS
Optical network
with OLM
Optical network
with OBT
Transmission
medium
Shielded two-wire
line
POF
PCF
Glass
Distances
Max. network span PROFIBUS DP:
9.6 km
PROFIBUS PA:
1.9 km
90 km 9.6 km
Between two devices up to 1 km 1) up to 15 km 2) up to 300 m 2)
Topology
Bus
Linear
Tree
Ring
Transmission
protocols
DP, PA DP, PA DP
Connection of
devices by means
of
OLM
Integrated interfaces
Bus terminal
Bus connector
Electrical network
segments can be
connected
● Suitable
Not relevant for this application
1) Depending on data rate and type of service used
2) Depending on cable type used
Installation guideline for PROFIBUS networks
A PROFIBUS segment must be terminated at the start and end; passively with a connector
or actively with a bus terminating resistor.
The same principles apply to the installation of a PROFIBUS network as described in the
SIMATIC NET PROFIBUS networks
(http://support.automation.siemens.com/WW/view/en/35222591) manual.
Description
2.2 Structure of PROFIBUS networks
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2.2.1
Passive network components for RS 485 networks
2.2.1.1
RS 485 cables
Introduction
The following applies to all RS 485 cables for PROFIBUS from Siemens:
Their double shielding makes them especially suited for laying in industrial environments
with electromagnetic interference.
A continuous grounding concept can be implemented by means of the outer shield of the
bus cable and the ground terminals of the bus terminals.
The imprinted meter marking makes it easier to determine the length (accuracy ±5%).
RS 485 cables for PROFIBUS
SIMATIC NET PROFIBUS cables are available in different versions which allow optimum
adaptation to different areas of application:
FC Standard Cable GP (bus cable for fixed laying inside buildings)
FC Standard Cable IS GP (bus cable for hazardous area)
FC-FRNC Cable GP (bus cable with halogen-free protective jacket for use inside
buildings)
FC Food Cable (bus cable with PE jacket for use in the food and beverage industry)
FC Robust Cable (bus cable with PUR jacket for environments subject to chemical and
mechanical stress)
FC Ground Cable (ground cable with PE jacket)
PROFIBUS FC Trailing Cable (trailing cable for tow chains)
PROFIBUS Festoon Cable (bus cable for festoon mounting)
PROFIBUS Torsion Cable (torsion-free bus cable for networking movable plant parts, for
example, robots)
PROFIBUS FC Flexible Cable (bus cable for machine parts that are moved infrequently
or cabinet doors)
SIENOPYR-FR ship cable (for permanent laying on ships and off-shore units in all rooms
and on open deck)
PROFIBUS Hybrid Standard Cable (hybrid cable with 2 power wires (1.5 mm2) for data
and power supply of the ET 200pro)
PROFIBUS Hybrid Robust Cable (trailable hybrid cable with 2 power wires (1.5 mm2) for
data and power supply of the ET 200pro)
Description
2.2 Structure of PROFIBUS networks
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Maximum cable lengths
When using copper cables, the maximum size of a PROFIBUS segment depends on the
transmission rate.
If these lengths are not sufficient for your application, you can expand the network by using
repeaters. You can achieve a maximum size by cascading up to nine repeaters.
Table 2- 4 Maximum cable lengths
Transmission rate
Maximum cable length of a bus
segment
Maximum distance between two
stations
9.6 to 187.5 kbps 1000 m 10000 m
500 kbps 400 m 4000 m
1.5 Mbps 200 m 2000 m
3 to 12 Mbps 100 m 1000 m
2.2.1.2
PROFIBUS FastConnect system
PROFIBUS FastConnect (FC)
PROFIBUS FastConnect is a system for fast and easy fabrication of PROFIBUS copper
cables.
The system consists of three components:
FastConnect bus cables for quick mounting
FastConnect stripping tool
FastConnect bus connector for PROFIBUS with insulation displacement method
FastConnect bus cables and stripping tool
The special design of the FastConnect bus cables allows for the use of the FastConnect
stripping tool to accurately strip away the protective jacket and the braided shield in one
step. The connection of the prepared cables takes place in the FastConnect bus connectors
using the insulation displacement method.
All PROFIBUS FastConnect bus cables can also be connected to the conventional bus
connectors with screw-type terminals.
Description
2.2 Structure of PROFIBUS networks
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Area of application
You need FastConnect bus connectors for PROFIBUS for the following applications:
Connect devices with an electrical 9-pin D-Sub interface to IEC 61158-2 directly with
SIMATIC NET PROFIBUS cables.
Connect electrical segments or individual devices to the Optical Link Module (OLM) and
Optical Bus Terminal (OBT).
Connect devices or programming devices to the repeater.
Versions
The FastConnect bus connector in degree of protection IP20 is available in the following
versions:
with integrated terminating resistor and isolating function
with or without PG socket
with a cable outlet of 35°, 90° or 180°
with device category 3G suitable for zone 2 hazardous area
Figure 2-5 Example for PROFIBUS FastConnect bus connector with PG socket, cable outlet 90°
Description
2.2 Structure of PROFIBUS networks
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Additional information
For additional information on the available components visit the Siemens Mall
(http://mall.industry.siemens.com).
2.2.1.3
PROFIBUS bus connector
Area of application
You need PROFIBUS bus connectors for the following applications:
Connect devices with a 9-pin D-Sub interface to IEC 61158-2 directly with the
SIMATIC NET PROFIBUS cables.
Connect electrical segments or individual devices to the Optical Link Module (OLM) and
Optical Bus Terminal (OBT).
Connect devices or programming devices to the repeater.
Description
2.2 Structure of PROFIBUS networks
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Versions
The PROFIBUS bus connector in degree of protection IP20 is available in the following
versions:
with integrated terminating resistor and isolating function
with or without PG socket
with a cable outlet of 35°, 90° or 180°
with device category 3G suitable for zone 2 hazardous area
Figure 2-6 Example for PROFIBUS bus connector with PG socket, cable outlet 35°
Additional information
For additional information on the available components visit the Siemens Mall
(http://mall.industry.siemens.com).
Description
2.2 Structure of PROFIBUS networks
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2.2.1.4
M12 bus connector
Area of application
Devices with an electrical M12 interface can use the M12 bus connector for SIMATIC NET
PROFIBUS for direct connection with the SIMATIC NET PROFIBUS cables.
The M12 bus connector in degree of protection IP65 is available in the following versions:
with screw-type terminals
with insulation displacement termination
with a cable outlet of 180°
2.2.1.5
Bus terminals for RS 485 networks
Bus terminal RS 485 and bus terminal M12
A bus terminal is used for the connection of an individual PROFIBUS station with RS485
interface to the PROFIBUS bus cable.
Bus terminals in degree of protection IP20 are available in the following versions:
Bus terminal RS 485 with or without PG interface, transmission rate 9.6 kbps to 1.5 Mbps,
integrated terminating resistor combination (connectible), with 1.5 m and 3 m connecting
cable
Bus terminal M12, transmission rate 9.6 kbps to 12 Mbps, integrated terminating resistor
combination with isolating function, with 1.5 m connecting cable
2.2.1.6
M12 bus terminating resistor
Terminating segment with terminating resistor
If there is a station with M12 connection system at the beginning or end of a PROFIBUS
segment, you need an M12 bus terminating resistor.
The M12 PROFIBUS connection of a device consists of an M12 socket for the infeed and an
M12 male connector to loop-through the bus signal.
This means you need one bus terminating resistor with male contacts (6GK1905-0EC00)
and with female contacts (6GK1905-0ED00) for each M12 bus cable.
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 25
2.2.2
Passive components for optical networks
2.2.2.1
Fiber-optic cables
Types of fiber-optic cables
Data transmission with fiber-optic cables takes place through modulation of electromagnetic
waves in the range of visible and invisible light. These cables are made of high-quality plastic
fibers and glass fibers:
Plastic and PCF fiber-optic cables (Page 26)
Glass fiber-optic cables (Page 27)
The different types of fiber-optic cables provide solutions matched to the operating and
environmental conditions for the connection of components with each other.
Benefits
Fiber-optic cables offer the following benefits when compared with electrical cables:
Galvanic isolation of the devices and segments
No potential equalization currents
No impact on transmission path through external electromagnetic interference
No lightning protection elements required
No noise radiation along the transmission route
Low weight
Depending on the type of fiber you can implement cable lengths up to few kilometers at
even higher transmission rates.
No dependency of the maximum permitted distances on the transmission rate
Additional information
Additional information of the properties and technical specifications of the passive
components and connectors for fiber-optic cables is available in the PROFIBUS network
manual (http://support.automation.siemens.com/WW/view/en/35222591).
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
26 Function Manual, 12/2014, A5E03775446-AC
2.2.2.2
Plastic and PCF fiber-optic cables
Plastic and PCF fiber-optic cables
Plastic (POF) and PCF fiber-optic cables are used for the connection of Optical Link modules
with connections for plastic fiber-optic cables (OLM/P), Optical Bus Terminal (OBT) and
devices with integrated optical interfaces. Under certain conditions, they are an inexpensive
alternative to conventional glass fiber-optic cables.
Plastic Fiber Optic duplex core
The plastic fiber-optic duplex core is a flat dual core with PVC inner jacket without protective
jacket. The cable can be easily assembled on-site.
The cable is intended for indoor applications with low mechanical loads or inside cabinets.
For OLM connections and with integrated optical interfaces you cover a length of up to 50 m
between two devices with this cable.
Plastic Fiber Optic standard cable
The plastic fiber optic standard cable consists of two plastic fibers with robust polyamide
inner jacket surrounded by Kevlar tensile elements and a purple PVC protective jacket. The
cable can be easily assembled on-site.
The robust round cable is suited for indoor applications. The maximum distance that can be
covered is 80 m for OLM/P connections and 50 m with integrated optical interfaces and OBT.
PCF Standard Cable
The pre-assembled PCF Standard Cable consists of two PCF fibers surrounded by Kevlar
tensile elements and a purple PVC protective jacket. It is always supplied with a pulling aid
installed on one end to pull in the cable channels.
The robust round cable is suited for indoor applications with cable lengths up to 400 m
(OLM) or 300 m (integrated optical interfaces, OBT) between two devices.
PCF Standard Cable GP
The PCF Standard Cable GP consists of two PCF fibers surrounded by Aramid tensile
elements and a green PVC protective jacket. The cable is pre-assembled and can be
ordered by the meter. It is supplied with a pulling aid installed on one end to pull in the cable
channels.
The robust round cable is suited for indoor and outdoor applications with cable lengths up to
400 m (OLM) or 300 m (integrated optical interfaces, OBT) between two devices.
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 27
PCF Trailing Cable
The PCF Trailing Cable consists of two PCF fibers surrounded by Aramid tensile elements
and a green PUR protective jacket. The cable is pre-assembled and can be ordered by the
meter. It is supplied with a pulling aid installed on one end to pull in the cable channels.
The robust round cable is suited for moving indoor and outdoor applications with cable
lengths up to 400 m (OLM) or 300 m (integrated optical interfaces, OBT) between two
devices.
PCF Trailing Cable GP
The PCF Trailing Cable GP consists of two PCF fibers surrounded by Aramid tensile
elements and a green PVC protective jacket. The cable is pre-assembled and can be
ordered by the meter. It is supplied with a pulling aid installed on one end to pull in the cable
channels.
The robust round cable is suited for moving indoor and outdoor applications with cable
lengths up to 400 m (OLM) or 300 m (integrated optical interfaces, OBT) between two
devices.
2.2.2.3
Glass fiber-optic cables
Glass fiber-optic cables
Glass fiber-optic cables are suitable for connection of optical interfaces that work in the
wavelength range around 850 nm and around 1300 nm. They include two graded-index
multimode fibers of the type 62.5/125 μm.
The glass fiber-optic cables are available in different versions which makes for an optimum
adaptation to different areas of application:
Fiber Optic standard cable
INDOOR Fiber Optic indoor cable
Flexible Fiber Optic trailing cable
Fiber Optic standard cable
The standard cable is the universal cable for indoor and outdoor use.
INDOOR Fiber Optic indoor cable
The indoor cable is intended for weather-proof indoor use. It is halogen-free, non-crush and
flame-retardant.
Description
2.2 Structure of PROFIBUS networks
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28 Function Manual, 12/2014, A5E03775446-AC
Flexible Fiber Optic trailing cable
The trailing cable was designed for the special application of forced movement, for example,
for constantly moved machine parts such as trailing chains. It is mechanically designed for
100,000 bending cycles by ±90° (with the specified minimum radius). Integrated dummy
elements ensure a round cross-section of the cable. The trailing cable can be used indoors
and outdoors.
Maximum distances between two optical link modules
The following distances may not be exceeded between two OLMs regardless of the optical
power budget:
OLM/P11, OLM/P12: 400 m
OLM/G11, OLM/G12, OLM/G12-EEC: 3 km
OLM/G11-1300, OLM/G12-1300: 15 km
Additional information
All operating instructions
(http://support.automation.siemens.com/WW/view/en/10805951/133300) of the
SIMATIC NET bus components include information on distances that can be covered with
the SIMATIC NET glass fiber-optic cables. You can configure your optical network without
any calculations using simple limits.
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 29
2.2.3
Active network components
2.2.3.1
Network components in electrical networks
Active network components
The following active network components are available for PROFIBUS in electrical networks:
Repeater RS485
Diagnostics repeater
PROFIBUS Terminator
DP/DP coupler
IE/PB Link PN IO
IWLAN/PB Link PN IO
Active components for the connection of CAN
Active components for the gateway between PROFIBUS and AS-Interface
DP/AS-i LINK Advanced
DP/AS-Interface Link 20E
DP/AS-i F-Link
RS485 repeater
The RS485 IP20 repeater connects two PROFIBUS bus segments in RS485 technology with
up to 32 devices. It provides transmission rates from 9.6 kbps to 12 Mbps.
The RS485 repeater refreshes a signal regarding amplitude, signal width and edge
steepness between two segments. It is used when more than 32 stations are connected to
the bus or the maximum cable length of a segment is exceeded.
Bus segments can be operated ungrounded (galvanic isolation of segments) with an RS485
repeater.
Diagnostics repeater
The diagnostic repeater connects three PROFIBUS segments in RS485 technology, two of
which are diagnostics-capable segments with 31 devices each. It is designed as DP slave to
send diagnostics alarms to the DP master.
The diagnostic function provides the location and the cause of cable faults, such as wire
break or missing terminating resistors. The fault location is indicated relative to the existing
devices.
The diagnostics repeater refreshes a signal regarding amplitude, signal width and edge
steepness between the segments. The cascading depth between any two PROFIBUS
devices is limited to nine diagnostics repeaters.
Description
2.2 Structure of PROFIBUS networks
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30 Function Manual, 12/2014, A5E03775446-AC
PROFIBUS Terminator
The PROFIBUS Terminator forms an active bus termination. Bus devices can be switched
off, removed or replaced without affecting data transmission. This is particularly true for bus
devices on both ends of the bus cable at which terminating resistors must be connected or
supplied. The PROFIBUS Terminator can be mounted on a standard mounting rail.
IE/PB Link PN for the connection of a PROFIBUS segment to an Industrial Ethernet network
The IE/PB Link PN IO as independent component provides the seamless transition between
Industrial Ethernet and PROFIBUS. Through the use of IE/PB Link PN IO as substitute on
the Ethernet, the existing PROFIBUS devices can continue to be used and can be integrated
into a PROFINET application.
A PROFINET IO controller is required for this configuration. The IE/PB Link PN acts as
master on the PROFIBUS end.
IWLAN/PB Link PN IO as gateway between LAN and PROFIBUS
PROFIBUS devices can be coupled to PROFINET IO by means of IWLAN/PB Link PN IO.
This means you can integrate existing PROFIBUS configurations into PROFINET.
The IWLAN/PB Link PN IO supports the use of IWLAN and WLAN antennas for wireless
data transmission, for example, in suspended monorail systems or conveyor systems.
Because of the PROFINET support, the numerous PROFIBUS system services, for
example, diagnostics by bus, can continue to be used.
A PROFINET IO controller is required for this configuration. The IWLAN/PB Link PN IO acts
as master on the PROFIBUS end.
CANopen module for connection to CAN
You can use the CANopen module to easily connect CANopen applications to PROFIBUS.
Typical areas of application:
Control of hydraulic valves/hydraulic axes in vehicles
Control of motors in packaging machines and on conveyor belts
Use in wind turbines for detection of angular encoders
Detection of HMI devices on machines, e.g., joysticks
Detection of measured data from displacement transducers, inclination sensors or angle
encoders on tower cranes or gantry cranes
DP/DP coupler for connection of two PROFIBUS networks
The PROFIBUS DP/DP coupler is used to connect two PROFIBUS DP networks. Data
(0 to 244 bytes) is transmitted from the DP master of the first network to the DP master of
another network and vice versa.
The DP/DP coupler comes equipped with two independent DP interfaces that establish the
connection to the two DP networks. There is one slave at each DP network. The data
exchange between the two DP networks takes place by internal copying in the coupler.
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 31
DP/PA bus link for connection of PROFIBUS PA
The DP/PA bus link is the connection between PROFIBUS DP and PROFIBUS PA. This
means it connects the process control systems with the field devices of the process
automation.
The following components are available for a DP/PA bus link:
DP/PA coupler Ex [ia]
DP/PA coupler FDC 157-0
Interface module IM 153-2 for establishing a DP/PA link.
Active field distributor AFDiS for hazardous areas
Active components for the gateway between PROFIBUS and AS-Interface
DP/AS-i LINK Advanced
:
The
DP/AS-i LINK Advanced
is PROFIBUS DPV1 slave (according to
IEC 61158-2/EN 61158-2) and AS-Interface master (according to AS-Interface
specification V3.0 according to EN 50295) and provides transparent data access to
AS-Interface from PROFIBUS DP.
PROFIBUS DP masters can cyclically exchange I/O data with the AS-Interface;
DP masters with acyclic services can also make AS-Interface master calls. The
DP/AS-i
LINK Advanced
is particularly suited for distributed configurations and for the connection
of a subordinate AS-Interface network.
The DP/AS-i LINK Advanced in the version as AS-Interface single master is completely
sufficient for applications with typical configuration limits.
For applications with high configuration limits, the DP/AS-i LINK Advanced is used as
AS-Interface double master. In this case, the duplicate configuration limits can be used
on two independently running AS-Interface strands.
DP/AS-Interface Link 20E:
The DP/AS-Interface Link 20E is PROFIBUS DP slave (in accordance with EN 61158)
and AS-Interface master (in accordance with AS-Interface specification V3.0 according to
EN 50295) and supports operation of the AS-Interface on PROFIBUS DP.
Single PROFIBUS masters can cyclically exchange I/O data with the AS-Interface;
masters with acyclic services can exchange I/O data and make master calls.
DP/AS-i F-Link:
The DP/AS-i F-Link is PROFIBUS DP-V1 slave (according to EN 61158) and AS-i master
(according to AS-Interface specification V3.0 to EN 50295) and provides transparent data
access to AS-Interface from PROFIBUS DP. The DP/AS-i F-Link is also the only AS-i
master that can forward safety-oriented input data of ASIsafe slaves to a fail-safe CPU
with PROFIBUS DP master by means of the PROFIsafe protocol. Additional safety
cabling or monitoring is not required (in particular, no AS-Interface safety monitor).
Depending on the slave type, you can transmit binary values or analog values. All slaves
according to AS-Interface specification V2.0, V2.1 or V3.0 can be operated as AS-i
slaves.
As fully-featured AS-i master according to specification V3.0, you can use higher
configuration limits on the AS-i network (496 inputs and outputs each, up to 62 digital or
analog slaves).
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
32 Function Manual, 12/2014, A5E03775446-AC
Additional information
Information on the components is available in the Siemens Mall
(http://mall.industry.siemens.com).
Additional information is available in these manuals:
PROFIBUS Network Manual
(http://support.automation.siemens.com/WW/view/en/35222591)
Diagnostic repeater (http://support.automation.siemens.com/WW/view/en/7915183)
DP/DP Coupler (http://support.automation.siemens.com/WW/view/en/1179382)
SIMATIC NET Twisted-Pair and Fiber-Optic Networks
(http://support.automation.siemens.com/WW/view/en/8763736)
Basics on Setting up an Industrial Wireless LAN
(http://support.automation.siemens.com/WW/view/en/9975764)
SIMATIC bus links, DP/PA coupler, active field distributors, DP/PA Link and Y Link
(http://support.automation.siemens.com/WW/view/en/1142696)
Information on the CANopen module is available on the Internet
(http://www.hms-networks.com/can-for-et200s).
DP/AS-interface LINK Advanced
(http://support.automation.siemens.com/WW/view/en/22502958/133300) manual
DP/AS-i F-Link (http://support.automation.siemens.com/WW/view/en/24196041) manual
See also
Topology with RS485 repeater (Page 35)
OLM topology (Page 40)
WLAN topology (Page 40)
Connecting PROFIBUS to PROFINET (Page 41)
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 33
2.2.3.2
Network components in optical networks
Active network components
The following active network components are available for PROFIBUS in optical networks:
Optical Link Module OLM
Optical Bus Terminal OBT
Optical Link Module OLM
You can use the PROFIBUS Optical Link Modul OLM to install PROFIBUS networks in line,
star structure and redundant ring structure.
The transmission rate of a fiber-optic cable line does not depend on the distance and can be
9.6 kbps to 12 Mbps.
Applications for OLM include, for example, plant buses on PROFIBUS base, networking
across buildings using glass fiber-optic cables, mixed networks with electrical and optical
segments, large networks (road tunnels, traffic guidance systems) and networks with high
demands on availability (redundant ring networks).
Optical Link modules can be combined by means of an RS485 interface and individual
devices or entire electrical segments can be integrated into the optical PROFIBUS network.
The following distances may not be exceeded between two OLMs regardless of the optical
power budget:
OLM/P11, OLM/P12: 400 m
OLM/G11, OLM/G12, OLM/G12-EEC: 3 km
OLM/G11-1300, OLM/G12-1300: 15 km
Optical Bus Terminal OBT (optical bus terminal)
The Optical Bus Terminal connects an individual PROFIBUS device without integrated
optical interface or a PROFIBUS RS 485 segment with up to 31 devices to an optical
PROFIBUS.
An individual PROFIBUS DP device is connected with its RS 485 interface by means of a
PROFIBUS cable with integrated terminating resistor, for example, connecting cable 830-1T,
to the RS 485 interface of the OBT. The OBT is integrated into the optical line by means of
two optical interfaces.
The following optical transmission media can be connected to the OBT:
Plastic fiber-optic cable up to 50 m single distance length. They can be assembled on-site
with two 2x2 Simplex connectors.
PCF fiber-optic cable up to 300 m single distance length. The cables are delivered
pre-assembled.
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
34 Function Manual, 12/2014, A5E03775446-AC
Additional information
Information on the components is available in the Siemens Mall
(http://mall.industry.siemens.com).
Additional information is available in these manuals:
PROFIBUS network manual
(http://support.automation.siemens.com/WW/view/en/35222591)
SIMATIC NET PROFIBUS, Optical Link Module
(http://support.automation.siemens.com/WW/view/de/56606534/0/en)
SIMATC NET Twisted-Pair and Fiber-Optic Networks
(http://support.automation.siemens.com/WW/view/en/8763736)
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 35
2.2.4
Examples for topology
2.2.4.1
Topology with RS485 repeater
Configuration options with the RS485 repeater
You can operate the RS485 repeater in the following configurations:
Figure 2-7 Segment 1 and segment 2 connected to RS485 repeater
Figure 2-8 Segment 1 and segment 2 looped-through to RS485 repeater
Figure 2-9 Segment 1 connected to RS485 repeater and segment 2 looped-through to RS485
repeater
Connect terminating resistor
Do not connect terminating resistor
Description
2.2 Structure of PROFIBUS networks
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36 Function Manual, 12/2014, A5E03775446-AC
Configuration example
Figure 2-10 Configuration example with five RS485 repeaters
Connect terminating resistor
Do not connect terminating resistor
Maximum configuration
If you install a PROFIBUS network with RS485 repeaters, you may not connect more than
nine RS485 repeaters in series.
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 37
2.2.4.2
Topology with diagnostic repeater
Diagnostic repeater with three segments
You may not exceed the maximum permitted cable length of 100 m per segment that can be
monitored for the diagnostic repeater. The segments connected to DP2 and DP3 are
diagnostics-capable. The cable length that can be monitored is limited for some cable types.
Maximum cascade depth
You can connect up to nine diagnostic repeaters in series between any two PROFIBUS
stations.
Figure 2-11 Schematic layout of a PROFIBUS network with maximum possible cascade depth at
diagnostic repeaters
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
38 Function Manual, 12/2014, A5E03775446-AC
Example: Maximum cascade depth exceeded
Figure 2-12 Maximum cascade depth exceeded
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 39
Layout with several segments
You can increase the number of used diagnostic repeaters by using several segments. The
example shows a layout in which the maximum cascade depth is exceeded at two segments.
Figure 2-13 Layout with several segments, maximum cascade depth exceeded
Additional information
Additional information is available in the Diagnostic Repeater
(http://support.automation.siemens.com/WW/view/en/7915183) manual.
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
40 Function Manual, 12/2014, A5E03775446-AC
2.2.4.3
OLM topology
Combination of electrical and optical networks with OLM
Additional distances can be covered by means of the Optical Link Module.
Because bus cables across several buildings are particularly vulnerable to damage caused
by overvoltage (effect of lightning), the devices in the connected bus segment must be
protected against overvoltage.
Figure 2-14 Combination of electrical and optical networks
2.2.4.4
WLAN topology
IWLAN/PB Link PN IO as gateway between Industrial Wireless LAN and PROFIBUS
The IWLAN/PB Link PN IO supports the use of IWLAN and WLAN antennas for wireless
data transmission. This means the numerous PROFIBUS system services, for example,
diagnostic by bus, can be used throughout.
Figure 2-15 PROFIBUS and WLAN
Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 41
2.2.4.5
Connecting PROFIBUS to PROFINET
PROFIBUS can be integrated in PROFINET. In this way, you can set up any hybrid systems
consisting of fieldbus and Ethernet-based subsystems. This provides a continuous data
exchange.
Coupling of PROFIBUS and PROFINET
With a proxy-capable PROFINET device that is equipped with a PROFIBUS interface in
addition to a PROFINET interface, you can integrate existing PROFIBUS configurations into
the PROFINET configuration.
Figure 2-16 Connection of PROFIBUS and PROFINET with IE/PB link
PROFINET device with proxy functionality
The PROFINET device with proxy functionality is the substitute for a PROFIBUS device on
Ethernet. The proxy functionality allows a PROFIBUS device to communicate not only with
its master but also with all devices on PROFINET.
With PROFINET, existing PROFIBUS systems can be integrated into the PROFINET
communication with the aid of an IE/PB link. The IE/PB link PN IO then handles
communication via PROFINET on behalf of the PROFIBUS components.
PROFIBUS with STEP 7 V13
42 Function Manual, 12/2014, A5E03775446-AC
Parameter assignment/addressing
3
To set up an automation system, you will need to configure, assign parameters and link the
individual hardware components. The work needed for this is undertaken in the STEP 7
device, topology and network view.
Configuration
"Configuring" is understood to mean arranging, setting and networking devices and modules
within the device or network view.
A PROFIBUS address is automatically assigned to each module. The addresses can be
subsequently modified.
The CPU compares the preset configuration created in STEP 7 with the actual configuration
of the plant. Errors can be detected and signaled immediately this way.
The exact procedure for configuring devices is described in detail in the STEP 7 online help.
Parameter assignment
"Parameter assignment" is understood to mean setting the properties of the components
used. The settings for the hardware components and for data exchange are assigned, for
example, activating diagnostics, input delay with DI.
The parameters are downloaded into the CPU and transferred to the corresponding modules
when the CPU starts up. Modules can be replaced with ease because with SIMATIC CPUs
the set parameters are automatically downloaded into the new module during each startup.
Adjusting the hardware to the project requirements
You need to adapt the hardware if you want to set up, expand or change an automation
project. To do this, add hardware components to your layout, link them with existing
components, and adapt the hardware properties to the tasks.
The properties of the automation systems and modules are preset so that in many cases you
do not have to assign parameters again.
But parameter assignment is required in the following cases:
You want to change the preset parameters of a module.
You want to use special functions.
You want to configure communication connections.
Parameter assignment/addressing
3.1 Assigning the DP slave to a DP master
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 43
Basic procedure for creating a PROFIBUS DP system
Configuration
Creating PROFIBUS devices and modules in STEP 7
Assigning the DP slave to a DP master (Page 43)
Optional: Parameter assignment
Assigning the PROFIBUS address (Page 45)
Making network settings (Page 46)
Considering cable configuration (Page 49)
Considering additional network devices (Page 51)
Bus parameters creating a user-defined profile (Page 52)
Configuring constant bus cycle time (Page 55)
3.1
Assigning the DP slave to a DP master
PROFIBUS DP system
A PROFIBUS DP system consists of a PROFIBUS DP master and its assigned
PROFIBUS DP slaves. Once the devices have been placed in the network view or device
view, STEP 7 assigns default parameter values to them. Initially, you only have to assign the
DP slaves to one DP master.
Requirement
The network view of STEP 7 is open.
A CPU has been placed (e.g., CPU 1516-3 PN/DP).
A DP slave has been placed (e.g., IM151-1 HF).
Parameter assignment/addressing
3.1 Assigning the DP slave to a DP master
PROFIBUS with STEP 7 V13
44 Function Manual, 12/2014, A5E03775446-AC
Procedure
To assign DP slaves to a DP master, follow these steps:
1. On the DP slave, use the left mouse button to click on the "Not assigned" link. The
"Select DP master" menu opens.
2. Select the DP master in the menu to which you want to assign the DP slave.
Result:
A subnet with a DP system is created on the CPU. The CPU is now the
PROFIBUS DP master. The DP slave is assigned to the DP master.
3. Repeat steps 1 and 2 for all other DP slaves that you want to assign to the DP master.
Figure 3-1 Assigning the DP slave to a DP master
Network overview
You can check the communication relationships of the activated interface in the network
overview. The network overview is context-sensitive for selection in the network view:
The selection of the CPU shows the DP communication of the CPU.
The selection of the station shows the communication of the entire station.
The selection of the interface shows the DP communication of the interface.
Parameter assignment/addressing
3.2 PROFIBUS address
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 45
3.2
PROFIBUS address
Devices can be connected to the PROFIBUS subnet that communicate by means of
configured connections or that are part of a PROFIBUS DP master system.
If the DP slave has already been assigned to a DP master, the PROFIBUS subnet to which
the device is connected is automatically displayed under "Interface linked with".
In the Inspector window under "PROFIBUS", select the subnet to which the interface is
linked or add a new subnet.
All devices of a subnet must have different PROFIBUS addresses.
Figure 3-2 PROFIBUS address
Rules for address assignment
STEP 7 automatically assigns device addresses.
You can change the addresses if you observe the following points:
Assign a unique PROFIBUS address to each device in the PROFIBUS network, each DP
master and each DP slave in the PROFIBUS network.
Depending on the DP slave, not all permitted PROFIBUS addresses are supported. For
devices with BCD switches, it is often the case that only the PROFIBUS addresses 1 to
99 are supported.
Changing the PROFIBUS address
You change the PROFIBUS address under "Parameter".
Parameter assignment/addressing
3.3 Network settings
PROFIBUS with STEP 7 V13
46 Function Manual, 12/2014, A5E03775446-AC
3.3
Network settings
Highest PROFIBUS address (HSA)
Outputs the highest PROFIBUS address of an active device. PROFIBUS addresses greater
than HSA are permitted for passive devices, but only up to 126.
Profile
Depending on the connected device types and the protocols used, different profiles are
available on the PROFIBUS. The profiles differ with respect to their setting options and
calculation of the bus parameters.
The PROFIBUS subnet will only work properly if the bus parameters of all devices have the
same values.
Figure 3-3 Network settings
Profiles and transmission rates
Table 3- 1 Profiles and transmission rates
Profiles
Supported transmission rates
DP 9.6 kbps to 12 Mbps
Standard 9.6 kbps to 12 Mbps
Universal (DP/FMS)
(FMS is not supported)
9.6 kbps to 1.5 Mbps
User-defined 9.6 kbps to 12 Mbps
Parameter assignment/addressing
3.3 Network settings
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 47
DP (recommended profile)
Select the "DP" profile if only devices meeting the requirements of the standard
EN 61158-6-3 are connected to the PROFIBUS subnet. The setting of the bus parameters
has been optimized for these devices. These include devices with DP master and DP slave
interfaces of SIMATIC S7 as well as distributed I/O devices from third parties.
Note
Profile for constant bus cycle time and isochronous mode
DP is the recommended profile for the configuration of constant bus cycle time and
isochronous mode.
Standard
Compared with the "DP" profile, the "Standard" profile gives you the option to take into
consideration devices of another project or devices that have not been configured here for
calculation of the bus parameters. The bus parameters are then calculated with a simple
algorithm that was not optimized.
Universal (DP/FMS) (FMS is not supported)
Select the "Universal (DP/FMS)" profile if individual devices in the PROFIBUS subnet use
the FMS service (e.g., CP 343-5, PROFIBUS FMS devices).
As with the "Standard" profile, here, too, you have the option to take additional devices into
consideration for calculation of the bus parameters.
Parameter assignment/addressing
3.3 Network settings
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User-defined
The PROFIBUS subnet will only work properly if the parameters for the profile have been
synchronized. Select the "User-defined" profile if none of the other profiles "match" for
operation of a PROFIBUS device and if you have to adapt the bus parameters for your
special layout.
You cannot configure all theoretically possible combinations with the user-defined profile
either. The PROFIBUS standard prescribes some parameter limits depending on other
parameters. It is, for example, not permitted that a responder responds (Min Tsdr) before the
initiator is able to receive the frame (Trdy). These standard specifications are also checked
in the "User-defined" profile.
Note
User-defined settings
Use user-defined settings only if you are familiar with the PROFIBUS parameters. It is
usually better to work with the "DP" profile.
Contact Customer Support (Page 91) if you have any questions.
The bus parameters that were last valid on the PROFIBUS subnet are automatically set as
user-defined. If the "DP" bus profile was valid for the subnet, for example, the bus
parameters for "DP" are set in the "User-defined" bus profile. You can modify the parameters
based on these settings.
The monitoring times are not automatically recalculated in the "User-defined settings" setting
so that the uniformity of the set values is not changed without your knowledge, for example,
to configure other configuration tools.
You can calculate the monitoring times Ttr and watchdog based on the parameters you have
set. To do so, click on the "Recalculate" button.
See also
Additional network stations (Page 51)
Parameter assignment/addressing
3.4 Cable configuration
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3.4
Cable configuration
Considering cable configuration
Information on the cable configuration can be taken into consideration for calculation of the
bus parameters. To do so, select the check box "Take into account the following cable
configuration" in the properties of the PROFIBUS subnet.
The other information depends on the type of cable used.
Figure 3-4 Cable configuration
Cable configuration: Fiber-optic cables/optical ring
The calculation depends on the used OLM types. Select the corresponding check box.
Multiple selections are possible.
Parameter assignment/addressing
3.4 Cable configuration
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Adapting bus parameters in the optical ring
With the layout as ring, there is a kind of redundancy because you have the option to
address all devices using the ring structure even if the connection between two devices is
interrupted.
The following configuration conditions must be met in the optical ring:
A free address below HSA (Highest Station Address)
Increase of the retry value to at least 3
(Network settings: user-defined profile)
Checking and adapting of the slot time
(Network settings: user-defined profile; bus parameters: Tslot parameter:
You need short slot time values for OLM / P12, medium slot time values for OLM / G12
and OLM / G12-EEC and high slot time values for OLM / G12-1300. This results in a high
performance for small networks and a medium to low performance with medium to large
networks.
Additional information
Additional information on adaptation of the retry value and the slot time is available in the
PROFIBUS Network Manual
(http://support.automation.siemens.com/WW/view/en/35222591).
Parameter assignment/addressing
3.5 Additional network stations
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3.5
Additional network stations
Communication load - considering additional network stations
The bus parameters depend on the communication volume of the active network stations.
There are differences between cyclical communication (DP) and connection-oriented,
acyclical communication (S7 communication, Send/Receive (FDL)). Contrary to DP, the
number and size of the communication jobs (communication load) depends on the user
program. This means the communication load cannot always be determined automatically.
If you select the check box "Consider the following network stations", you can consider
network stations in the calculation of the bus times that were not configured in the project.
Figure 3-5 Additional network stations
Calculating the bus times
You can specify a network configuration in the parameter group "Additional network stations"
for calculation of the bus times that deviates from the configured network configuration.
The network configuration is available for the following profiles:
Standard
Universal (DP/FMS)
User-defined
Parameter assignment/addressing
3.6 Bus parameters
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Quantification of the communication load
The following settings are possible to take the communication load into consideration:
Number of network stations that are not configured
Information on the communication load from the user programs for FDL or S7
communication. You can choose from the following levels:
Low: Typical for DP, no larger data communication except DP.
Medium: Typical for mixed operation of DP and other communication services
(e.g., S7 communication), if DP has high time requirements and with medium,
acyclical communication volume.
High: For mixed operation of DP and other communication services
(e.g., S7 communication), if DP has low time requirements and with high, acyclical
communication volume.
3.6
Bus parameters
Introduction
Bus parameters control the transmission behavior on the bus. Each device on the bus must
correspond with the bus parameters of other devices.
Note
The PROFIBUS subnet will only work properly if the parameters for the bus profile have
been synchronized. Change the preset values only if you are familiar with the parameter
assignment of the bus profile for PROFIBUS.
Parameter assignment/addressing
3.6 Bus parameters
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Cyclical distribution of the bus parameters
If the check box "Activate cyclical distribution of bus parameters" is selected under "Bus
parameters" with the selected PROFIBUS subnet in the Inspector window, the bus
parameters are sent cyclically during operation by the modules that support this function.
This way you can, for example, connect a programming device to the PROFIBUS during
operation.
Disable this function in the following cases:
In constant bus cycle time mode to minimize the bus cycle.
If third-party devices are connected in the PROFIBUS subnet whose protocol uses the
DSAP 63 (Destination Service Access Point) for multicast.
Figure 3-6 Bus parameters
Parameter assignment/addressing
3.6 Bus parameters
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Bus parameters for the bus profile of PROFIBUS subnets
Note
Display of offline values
The offline values of the bus parameters are always displayed even if they are connected
online with the target system.
Table 3- 2 Bus parameters - value ranges
Bus parameters
Adjustable 1
Limit values
Tslot_Init Yes Max. Tsdr + 15 <= Tslot_Init <= 16.383 t_Bit
Max. Tsdr Yes 35 + 2*Tset + Tqui <= Max. Tsdr <= 1,023 t_Bit
Min. Tsdr Yes 11 t_Bit <= Min. Tsdr <= MIN(255 t_Bit, ...
... Max. Tsdr - 1, 34 + 2*Tset + Tqui)
Tset Yes 1 t_bit <= Tset <= 494 t_bit
Tqui Yes 0 t_bit <= Tqui <= MIN(31 t_bit, Min. Tsdr - 1)
GAP factor Yes 1 <= GAP factor <= 100
Retry limit Yes 1 <= Retry limit <= 15
Tslot ( slot time) No -
Tid2 No Tid2 = Max. Tsdr
Trdy No Trdy = Min. Tsdr
Tid1 No Tid1 = 35 + 2*Tset + Tqui
Ttr (Target Rotation Time) Yes 256 t_Bit <= Ttr <= 16,777,960 t_bit
Ttr typical No This time is for information only and is not transmitted to
the devices.
Watchdog 10 ms <= Watchdog <= 650 s
1 depending on bus profile
User-defined bus profile
Use the following settings to create a user-defined bus profile:
minimum Target Rotation Time (Ttr) = 5000x HSA (highest PROFIBUS address of an
active device)
minimum watchdog (Watchdog) = 6250x HSA
Recalculate
Use the button "Recalculate" to recalculate the parameters.
Parameter assignment/addressing
3.7 Constant bus cycle time
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3.7
Constant bus cycle time
Constant bus cycle time
The DP master addresses its assigned DP slaves cyclically. S7 communication may cause
the intervals to vary. You can enable a "bus cycle with constant bus cycle time" to achieve
identical intervals. This ensures data transmission at the same (constant bus cycle time)
intervals.
Figure 3-7 Enabling a bus cycle with constant bus cycle time
Number of OPs/PGs/TDs at the PROFIBUS
Here you enter the number of devices that are not configured.
Parameter assignment/addressing
3.7 Constant bus cycle time
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Increasing DP cycle time manually
The following situation can occur especially with very short DP cycle times:
The runtime of the user program is greater than the shortest cycle (see Technical
specifications of the CPU, section "Isochronous mode"). You have to manually increase the
automatically calculated DP cycle time in this case.
See also
Configuring isochronous mode (Page 67)
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4
4.1
Overview
Diagnostics options
In case of an error you can determine the current status of your automation system and react
specifically by using the event-related diagnostics and the evaluation of interrupts.
You can use the following options for diagnostics of the PROFIBUS components:
Determine the status of the system using the Lifelist in STEP 7.
Evaluate the module status, error and message texts by using the display of the S7-1500
CPU.
Run cable diagnostics during operation by means of the diagnostics repeater.
Evaluate the diagnostics and interrupt behavior in isochronous mode. (Page 70)
Determine status information for fault localization and fault rectification by using the
DP/PA coupler FDC 157-0 configured as PROFIBUS diagnostics slave.
Additional information
Additional information on diagnostics is available in these manuals:
In the Diagnostics repeater for PROFIBUS-DP
(http://support.automation.siemens.com/WW/view/en/7915183) manual for diagnostics
with STEP 7, diagnostics in the user program, monitoring function isochronous
PROFIBUS, topology display in STEP 7.
In the Diagnostics (http://support.automation.siemens.com/WW/view/en/59192926)
function manual for diagnostics options that are available for the SIMATIC systems
S7-1500, ET 200MP, ET 200SP and ET 200AL.
In the PROFIBUS Network Manual
(http://support.automation.siemens.com/WW/view/en/35222591) system manual for
diagnostics of fiber-optic cables.
In the DP/PA Coupler, Active Field Distributors, DP/PA Link and Y Link
(http://support.automation.siemens.com/WW/view/en/1142696) operating instructions.
In the Web Server (http://support.automation.siemens.com/WW/view/en/59193560)
function manual for diagnostics options (based on the functionality of the CPU).
Diagnostics
4.2 Diagnostics using the display of the S7-1500
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4.2
Diagnostics using the display of the S7-1500
Displays
Each CPU in the S7-1500 automation system has a front cover with a display and operating
buttons. Control and status information is displayed in different menus on the display. You
use the operating buttons to navigate through the menus.
The following states can be evaluated on the display:
Module status for central and distributed modules
Error and alarm texts (system diagnostics, user-defined alarms)
Module status
From the station overview you go to the module status for a distributed module via the
module overview.
Figure 4-1 Example: Station overview, module overview, module status
Diagnostics
4.2 Diagnostics using the display of the S7-1500
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Error and alarm texts
Figure 4-2 Example: Diagnostic buffer, alarms
Additional information
Additional information on the topic "Functions and operation of the display" is available in the
documentation for the S7-1500 automation system on the Internet
(http://support.automation.siemens.com/WW/view/en/59191792).
Diagnostics
4.3 Diagnostics with the diagnostic repeater
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4.3
Diagnostics with the diagnostic repeater
Introduction
The diagnostic repeater is a repeater that can monitor two segments of a RS485-PROFIBUS
subnet (copper cable) during operation and signal cable faults to the DP master by sending a
diagnostic frame. Fault location and the cause of the fault can be displayed in plain text by
means of STEP 7 as well as operator control and monitoring devices (SIMATIC HMI).
With its cable diagnostics during operation, the diagnostic repeater allows you to detect and
localize cable faults early on. This means plant faults are detected early and plant downtimes
can be prevented.
Diagnostic functions
The diagnostic function provides the location and the cause of cable faults, such as wire
break or missing terminating resistors. The fault location is specified relative to the
devices present, for example "Break on signal line A and/or B".
Reading out the saved diagnostic and statistical information.
Monitoring of the isochronous PROFIBUS, e.g., violation of cycle time.
Providing identification data.
Additional information
Additional information on diagnostics with STEP 7 and for reading out the diagnostics with
the user program is available in the Diagnostic repeater for PROFIBUS DP
(http://support.automation.siemens.com/WW/view/en/7915183) manual.
Diagnostics
4.4 I&M data (Identification and Maintenance)
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4.4
I&M data (Identification and Maintenance)
Definition and properties
Identification and maintenance data (I&M) is information saved in a module to provide
support when:
Checking the plant configuration
Locating hardware changes in a plant
Identification data (I data) is module information (some of which may be printed on the
module housing) such as the order and serial number. I data is read-only, vendor-specific
module information.
Maintenance data (M data) is system-specific information such as the installation location
and date. M data is generated in the course of configuration and is written to the module
memory.
The modules can be uniquely identified in online mode by means of the I&M data.
Additional information
Information if and to what extent a DP device supports I&M data is available in the respective
device manual of the device.
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Functions
5
5.1
Isochronous mode
5.1.1
What is isochronous mode?
Why isochronous mode?
Assuming public transport were to operate at maximum speed while reducing stop times at
the passenger terminals to absolute minimum, the last thing many potential passengers
would notice of the departing contraption are its red tail lights. The overall travel time is,
however, decided by the train, bus or underground clock, because well adjusted timing is
essential to a good service. This also applies to distributed automation engineering. Not only
fast cycles but also the adaptation and synchronization of the individual cycles result in
optimum throughput.
Just-In-Time
Figure 5-1 System cycle
The high speed and reliable reaction time of a system operating in isochronous mode is
based on the fact that all data is provided just-in-time. The constant bus cycle time
PROFIBUS DP cycle beats the time here.
Functions
5.1 Isochronous mode
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Advantages of isochronous mode
The use of isochronous mode provides:
Optimized controls
Determinism
Consistent (simultaneous) reading of input data
Consistent (simultaneous) output of output data
5.1.2
Use of isochronous mode
The system property "isochronous mode" enables recording of measured values and
process data in a defined system cycle. Signal processing takes place in the same system
cycle all the way to switching to the "output terminal". This means isochronous mode
improves the control quality and provides greater manufacturing precision. Isochronous
mode drastically reduces the possible fluctuations of process response times. The time-
assured processing can be used for a higher machine cycle.
Isochronous mode is basically always the choice when acquisition of measured values
needs to be synchronized, movements need to be coordinated and process reactions need
to be defined and take place simultaneously. This means the areas of applications for
isochronous mode are manifold.
Functions
5.1 Isochronous mode
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5.1.3
Isochronous applications
Example: Isochronous measurement at several measuring points
QC requires precise measurement of dimensions within a camshaft production process.
Figure 5-2 Measuring of camshafts
Isochronous workflow
By using the system property "isochronous mode" and the associated simultaneous
measured value acquisition, measurement can be performed continuously and the time
required for measurement is reduced. Resultant workflow:
Continuous turning of the camshaft.
During the continuous turning, measure the positions and cam excursion synchronously.
Process the next camshaft.
All camshaft positions and the corresponding measured values (red) are measured
synchronously within a single rotation of the camshaft. This increases machine output and
maintains or enhances precision of the measurement.
Functions
5.1 Isochronous mode
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5.1.4
Sequence of synchronization
From reading of input data to output of output data
The sequence of all components involved in the synchronization is explained in the
paragraphs below:
Isochronous reading of input data
Transport of input data by means of the PROFIBUS subnet to the DP master (CPU)
Further processing in the isochronous application of the CPU
Transport of output data by means of the PROFIBUS subnet to the output DP slave
Isochronous output of output data
T_DC Date cycle
TI Time for reading the input data
TO Time for output of output data
Figure 5-3 Time sequence of synchronization
To ensure that all input data is ready for transportation via the PROFIBUS DP line when the
next PROFIBUS DP cycle begins, the I/O read cycle has a lead time TI so that it starts
earlier. The TI is the "flash gun" for all inputs. This TI is necessary to compensate for analog
to digital conversion, backplane bus times, etc. The lead time TI can be configured by
STEP 7 or by the user. We recommend that you have TI assigned automatically by STEP 7 .
The PROFIBUS DP line transports the input data to the DP master. The synchronous cycle
interrupt OB SynchronousCycle is called. The user program in the synchronous cycle
interrupt OB decides the process reaction and provides the output data in time for the start of
the next data cycle. The length of the data cycle is always configured by the user.
Functions
5.1 Isochronous mode
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To is the compensation from the backplane bus and the digital to analog conversion within
the slave. The To is the "flash gun" for all outputs. The time To can be configured by STEP 7
or by the user. We recommend that you have To assigned automatically by STEP 7.
Without isochronous mode, application, data transmission and field devices have their own,
unsynchronized processing cycles; these result in a higher total cycle time with high jitter.
With isochronous mode, application, data transmission and field device are synchronized
resulting in a minimum total cycle with minimum jitter.
Isochronous mode and non isochronous mode distributed I/O
It is possible to combine isochronous mode distributed I/O with non isochronous mode
distributed I/O on one DP master.
5.1.5
Requirements for configuration
Note the following requirements for configuration of isochronous mode:
Isochronous mode cannot be used in optical PROFIBUS networks.
Constant bus cycle time and isochronous mode are only possible with the bus profiles
"DP" and "User-defined".
Isochronous mode is only possible with the DP interfaces integrated in the CPU.
Isochronous mode with CPs for PROFIBUS is not possible.
Only the constant bus cycle time master is permitted as active station on the isochronous
PROFIBUS DP. OPs and PGs (for example, PCs with PG functionality) influence the time
behavior of the isochronous DP cycle and are therefore not permitted.
Isochronous mode is not permitted across lines.
Isochronous I/O can only be processed in process image partitions. Isochronous
consistent data transmission is not possible without the use of process image partitions.
The adherence to quantity structures is monitored because the number of slaves and
bytes on the DP master system is limited for each process image partition.
The addresses of isochronous modules must be located in a process image partition.
Full isochronous mode from "terminal" to "terminal" is only possible if all components
involved in the chain support the system property "isochronous mode".
Make sure you look for the entry "Isochronous mode" or "Isochronous processing" in the
information box of the module when you select it in the catalog.
When you configure isochronous mode, you may not assign a SYNC/FREEZE group to
the slave.
Functions
5.1 Isochronous mode
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5.1.6
Configuring isochronous mode
Introduction
A SIMATIC automation solution can be connected to the isochronous PROFIBUS with the
isochronous mode function. Isochronous mode guarantees the synchronous reading of input
data, the processing and output of output data at the same (isochronous) intervals.
Basic procedure for configuration of isochronous mode
1. Setting the properties for isochronous mode on the DP slave:
Isochronous DP cycle
Isochronous mode of the modules
2. Setting the properties for isochronous mode on the modules:
Synchronous cycle interrupt (SynchronousCycle)
Process image partition
Input delay
3. Create user program with access to isochronous I/O
Requirement
The network view in STEP 7 is open.
A CPU has been placed (e.g., CPU 1516-3 PN/DP).
An interface module has been placed and networked with the CPU (e.g., IM 151-1 HF).
I/O modules have been placed (e.g., 2DI x DC24V HF and 2DO x DC24V/0,5A HF).
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5.1 Isochronous mode
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Configuring isochronous mode on the DP slave
1. Select the DP slave in the network view and navigate to the "isochronous mode" area in
the Inspector window.
2. Enable the option for synchronization to the DP cycle for the DP slave.
Default: The DP slaves get the Ti/To values from the subnet which means the values are
automatically the same for all DP slaves of the DP master system.
3. Enable the "Isochronous mode" option the the "Detail view" for all I/O modules you want
to operate in isochronous mode.
4. Repeat steps 1 and 3 for all DP slaves that you want to operate in isochronous mode.
Figure 5-4 Configuring isochronous mode on the DP slave
Functions
5.1 Isochronous mode
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Configuring synchronous cycle interrupt on the I/O module
1. Select an I/O module in the device view and navigate to the "I/O addresses" area in the
Inspector window.
The option for isochronous mode is selected.
2. Select the synchronous cycle interrupt in the drop-down list.
Figure 5-5 I/O addresses - creating the synchronous cycle interrupt OB
3. Assign the process image partition configured in the CPU.
Figure 5-6 I/O addresses - assigning process image partitions
4. Repeat steps 1 and 3 for all I/O modules that you want to operate in isochronous mode.
Functions
5.1 Isochronous mode
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Programming isochronous mode
To operate your plant in isochronous mode, the user program must be structured
accordingly. This means you have to add a synchronous cycle interrupt in the STEP 7
project tree.
You access the isochronous I/O by means of a process image partition, which means the
addresses of the isochronous modules must be located in a process image partition. You
program access to isochronous I/O with the "SYNC_PI" instructions (updating the process
image partitions of the inputs) and "SYNC_PO" (updating the process image partition of the
outputs) in the synchronous cycle interrupt OB.
You call the "SYNC_PI" instruction at the start of the synchronous cycle interrupt OB,
provided you have selected the automatic setting for the delay time. You call the
"SYNC_PO" instruction at the end of the synchronous cycle interrupt OB.
5.1.7
Diagnostics and interrupt functions
The diagnostic and interrupt functions of STEP 7 are available for isochronous mode. These
reduce downtimes and simplify localization and elimination of faults.
Events, causes of errors and remedies
Below, you will find the events for diagnostic and interrupt functions and remedies for the
problem.
Table 5- 1 Events, causes of errors and remedies
Event
Cause of the error
Remedy
Synchronous cycle interrupt OB is
started with the input parameter
EventCount > 0 (number of lost OB
calls since last OB call)
If configured:
Call of the time error OB
Diagnostic buffer entry "Buffer overflow
for OB6x events"
The synchronous cycle interrupt OB
takes too long.
Shorten the synchronous cycle
interrupt OB.
Increase the DP cycle.
Reduce the delay time setting
(setting with isochronous mode at
synchronous cycle interrupt OB).
Error (negative RetVals) when updating
the isochronous process image partition
with SYNC_PI / SYNC_PO:
Consistency warning
Update time is after / before the
permitted access window.
SYNC_PI / SYNC_PO are not called
in the permitted access window in
the synchronous cycle interrupt OB,
which means they are called or
processed during the I/O data
transfer on PROFIBUS.
Increase the delay time.
Increase the DP cycle.
Adapt the program.
Error when updating the isochronous
process image partition with
SYNC_PI / SYNC_PO:
Access error
DP slave / module does not respond
/ is not available.
Functions
5.1 Isochronous mode
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5.1.8
Parameter settings for isochronous mode
Parameter changes as task of the field service technician
The task of a field service technician is to maintain the production process.
In this context the technician has to detect, localize and eliminate errors and performance
losses of isochronous mode.
All parameters which influence isochronous mode can be checked and configured using the
"Isochronous mode" dialog box.
Parameters should only be changed by experienced users or service technicians.
5.1.8.1
Viewing isochronous mode parameters
"Isochronous mode" dialog box
1. Select "Properties > Isochronous mode" in the Inspector window.
The "isochronous mode" dialog box opens with an overview of parameters which
influence isochronous mode.
Information on the individual parameters is available under "Detail overview".
2. Compare the values shown with the values in the documentation, or with the value
specified by a technician.
Figure 5-7 Viewing parameters for isochronous mode
Functions
5.1 Isochronous mode
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5.1.8.2
Change parameters
Changing parameters for the DP master system
You can change the parameters for isochronous mode in the "Constant bus cycle time"
dialog box.
1. Select the DP master system in the network view.
2. Select the section "Constant bus cycle time" in the Inspector window.
3. Change the parameters according to the received instructions.
Figure 5-8 Changing parameters for the DP master system
Functions
5.1 Isochronous mode
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Adapting the input delay
1. Select the input module in the device view.
2. Select the section "Inputs" in the Inspector window.
3. Adapt the input delay.
Figure 5-9 Adapting the input delay
Compile, load and save the changed configuration
1. Put the plant out of operation.
2. Select the CPU in the project navigator.
3. Select "Compile > Hardware" in the shortcut menu.
4. Select "Download to device" in the shortcut menu.
5. Save the project.
Functions
5.2 Acyclical data exchange
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5.2
Acyclical data exchange
Additional functionality with DPV1 devices (DP master/DP slaves)
DP masters and DP slaves that support DPV1 have the following additional functions
compared to the devices that support only DPV0:
The acyclic data exchange between master and slave is supported.
Interrupts can be set by a DPV1 slave which ensure handling of the interrupt-triggering
event in the master CPU.
Acyclic data exchange
Read/write data record, for example, to change the parameters of a slave during operation.
The data records of a module and the structure of these data records is available in the
documentation for the respective module.
The table below contains the instructions with their functions for access to DPV1 slaves.
Detailed information is available in the STEP 7 online help.
Table 5- 2 Instructions for access to DPV1 slaves
Instructions
Function (DPV1)
RDREC Read data record
WRREC Write data record
RALRM Receive interrupt from a DP slave.
(The instruction must be called in the OB that triggers the interrupt.)
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5.3
SYNC/FREEZE groups
Assigning the SYNC/FREEZE group to the DP slave
A DP master with the corresponding functionality can send the control commands SYNC
and/or FREEZE for synchronization of the DP slaves simultaneously to a group of DP
slaves. You must assign SYNC/FREEZE groups to the DP slaves for this purpose.
Requirement: A DP master system has been created in the project.
Procedure
To assign a DP slave to a SYNC/FREEZE group, follow these steps:
1. Select the DP interface of the DP slave you want to assign to a group in the device view
or network view.
2. Select the check boxes for the required SYNC/FREEZE groups under the group
"SYNC/FREEZE" in the Inspector window.
You can assign each DP slave to only one SYNC/FREEZE group.
Figure 5-10 Assigning the DP slave to a SYNC/FREEZE group
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Important information on the control commands SYNC and FREEZE
You can use the control commands SYNC and FREEZE in the DP master to synchronize the
DP slaves event-controlled. The DP master sends the control commands simultaneously to a
group of DP slaves in its master system. It does not take into consideration DP slaves that
have failed or are currently sending diagnostic information.
Requirement for synchronization using control commands is that you have assigned the DP
slaves to SYNC/FREEZE groups.
For a S7 CPU use the instruction DPSYC_FR (SFC 11) to synchronize the DP slaves.
When you select the DP master, you see a list of the eight SYNC/FREEZE groups under
"Properties > DP interface > SYNC/FREEZE" in the Inspector window.
Figure 5-11 SYNC/FREEZE groups on DP master
SYNC control command
The DP master uses the SYNC control command to cause a group of DP slaves to freeze
the states of their outputs to the current value.
The DP slaves save the output data of the DP master for the following frames. But the states
of the DP slave outputs remain unchanged.
Only after each new SYNC control command does the DP slave set its outputs to the values
that it has saved as the output data of the DP master.
The outputs are not updated cyclically again until the DP master has sent a UNSYNC control
command.
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FREEZE control command
After receiving the FREEZE control command from the DP master, the DP slaves of a group
freeze the current status of their inputs. The DP slaves send these frozen input data to the
DP master with the following cyclical frames.
The DP slaves freeze the current state of their inputs again after each new FREEZE control
command.
The state of the DP slave inputs is only send to the DP master cyclically again when the DP
master sends the UNFREEZE control command.
5.4
Interrupts
Interrupts and interrupt OBs for DPV1
Interrupts can be set by a DPV1 slave which ensure handling of the interrupt-triggering event
in the master CPU. The interrupt data is evaluated in the CPU and the diagnostics buffer and
the module state are updated even in the "STOP" operating mode. The OB is not processed
in STOP.
The following DPV1 interrupts are supported:
Status interrupt
Update interrupt
Vendor-specific interrupt
Detailed information is available in the descriptions on the OBs. You can use the
corresponding OBs that are provided by the operating system of the S7 CPUs for diagnostic
interrupts, hardware interrupts, and pull/plug interrupts.
OB 55 interrupt - Status interrupt
The status interrupt can be triggered when the operating mode of a device or module
changes, for example, from RUN to STOP.
OB 56 interrupt - Update interrupt
An update interrupt can be triggered if the parameters of a slot were changed. This may be
caused by local access or partner access to the parameters.
OB 57 interrupt - Vendor-specific interrupt
The event that triggers the vendor-specific interrupt can be specified by the manufacturer of
a DPV1 slave.
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Additional information
A detailed description of the events at which interrupts are triggered is available in the
documentation of the respective manufacturer of the DPV1 slave.
5.5
Intelligent DP slaves (I-slaves)
5.5.1
I-slave functionality
I-slave functionality
The "I-slave" (intelligent DP slave) functionality of a CPU supports the exchange of data with
a DP master and thus allows the CPU to be used, for example, as intelligent preprocessing
unit of subprocesses. The I-slave is connected in its role as DP slave to a "higher-level" DP
master.
The preprocessing is handled by the user program in the I-slave. The process values
acquired by the I/O modules are preprocessed by the user program and made available to
the DP master.
Figure 5-12 I-slave functionality
"I-slave" naming convention
In the remainder of this description, a CPU or a CP with I-slave functionality is simply called
an "I-slave".
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Advantages of configurations with I-slaves
The I-slave offers the following advantages:
Simple coupling of CPUs with PROFIBUS interface
Real-time communication between CPUs and PROFIBUS interface
Distributed processing
A complex automation task can be divided into smaller units/subprocesses. This results
in manageable processes which lead to simplified subtasks.
Relieving the DP master by distributing the computing capacity to I-devices
Lower communication load by processing process data locally
Separating subprocesses
Complicated, widely distributed and extensive processes can be subdivided into several
subprocesses with manageable interfaces by using I-slaves. These subprocesses can be
stored in individual STEP 7 projects if necessary, which can later be merged to form one
master project.
Separating STEP 7 projects
Creators and users of an I-device can have completely separated STEP 7 projects. The
GSD file together with the configuration of the transfer areas of the I-slave form the
interface between the STEP 7 projects. This allows coupling to standard DP masters via
a standardized interface.
Know-how protection
Plant units can now only be delivered with a GSD file and the configuration of the transfer
areas instead of with a STEP 7 project for the I-slave interface description. This means
that you no longer have to disclose the user program know-how.
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Difference: DP slave - I-slave
In the case of a DP slave, the DP master accesses the distributed inputs/outputs directly.
In the case of an I-slave, the DP master accesses a transfer area in the I/O address space of
the preprocessing CPU instead of accessing the connected inputs/outputs of the I-slave. The
user program running on the preprocessing CPU is responsible for ensuring data exchange
between the operand area and inputs/outputs.
Figure 5-13 Data access to an I-slave
Note
DP master or DP slave
Note: The communication modules of the S7-1500 CPUs/ET 200SP CPUs, for example the
CP 1542-5, support the operation as DP master or DP slave only as alternative.
Note
The I/O areas configured for data exchange between the DP master and DP slaves must not
be used by I/O modules.
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5.5.2
Data exchange with higher-level DP master
Introduction
The following section describes the data exchange between the I-slave and the higher-level
DP master.
Transfer areas
Transfer areas are an interface to the user program of the I-slave CPU. Inputs are processed
in the user program and outputs are the result of the processing in the user program.
The data for communication between DP master and I-slave is made available in the transfer
areas. A transfer area contains an information unit that is exchanged consistently, in terms of
bytes, words or overall, between DP master and I-slave. You can find more information on
configuration and use of transfer areas in the section Configuring transfer areas (Page 84).
The following figure shows the data exchange between the I-slave and the higher-level DP
master. The individual communication relations are explained below based on the numbers.
Figure 5-14 Data exchange with the DP master
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Data exchange between higher-level DP master and normal DP slave
In this way, the DP master and the DP slave exchange data through PROFIBUS.
Data exchange between higher-level DP master and I-slave
In this way, the DP master and the slave exchange data through PROFIBUS.
The data exchange between a higher-level DP master and an I-slave is based on the
conventional DP master/DP slave relationship.
For the higher-level DP master, the transfer areas of the I-slave represent submodules of a
DP slave.
The output data of the DP master is the input data of the I-slave. Analogously, the input data
of the DP master is the output data of the I-slave.
Transfer relationship between the user program and the transfer area
In this way, the user program and the transfer area exchange input and output data.
Data exchange between the user program and the I/O of the I-slave
In this way, the user program and the centralized I/O of the I-slave exchange input and
output data.
5.5.3
Configuring an I-slave
Requirements for configuring an I-slave
The I-slave consists of:
A CPU from S7-1500 and a communications module CM 1542-5/CP 1542-5
(STEP 7 as of V12)
A CPU from ET 200SP and a communications module CM DP (STEP 7 as of V13 SP1)
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Procedure for configuring an I-slave
This section shows how to configure an I-slave in STEP 7 based on the example of a
CPU 1512SP-1 PN. The procedure for the CPUs from S7-1500 with CM 1542-5/CP 1542-5
and for the CPU 1510SP-1 PN with CM DP is the same.
To configure an I-slave, follow these steps:
1. Drag a CPU 1512SP-1 PN from the hardware catalog to the network view.
2. Open the device view of the CPU.
3. Double-click on the CM DP communications module in the hardware catalog.
STEP 7 creates the CM DP in the device view.
4. Select the PROFIBUS interface of the CM DP communications module.
5. In the Inspector window in the area navigation, select the "Operating mode" entry and
enable the "DP slave" check box.
6. Now you can select the DP master in the "Assigned DP Master" drop-down list.
Once you have selected the DP master, the networking and the DP master system
between both devices are displayed in the network view.
Figure 5-15 Configuring an I-slave
Note
Operation using a GSD file
If you operate an I-slave using a GSD file, you should not select the "Test, commissioning
and routing" check box.
Create a DP subnet on the PROFIBUS interface of the I-slave.
Result
You have configured an I-slave.
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5.5.4
Configuring transfer areas
Requirements for configuring transfer areas
You have configured an I-slave in STEP 7.
You are in the device view of the I-device and have selected the PROFIBUS interface of
the communications module.
Procedure for configuring transfer areas
To configure transfer areas for an I-slave in STEP 7, follow these steps:
1. In the area navigation, go to the section "Operating mode" > "I-slave communication" >
"Transfer areas".
2. Create transfer areas. Set the properties of the created transfer areas.
Click in the first cell of the "Transfer area" column. STEP 7 assigns a default name that you
can change.
Select the type of communication relation: Currently, you can only select MS for
"master-slave communication relation".
STEP 7 assigns the addresses for the transfer area automatically. Correct the addresses if
necessary.
Set the length of the transfer area. Specify the length of the transfer area in the cell in the
following format: [1...64] Byte/Word.
Examples: "32 Byte", "64 Word"
Specify whether the transfer area is exchanged in units of bytes or words or consistently
over the entire length between the DP master and I-slave.
Figure 5-16 Configuring transfer areas
A separate entry is created in the area navigation for each transfer area. If you select one of
these entries, you can adjust the details of the transfer area, or correct them and comment
on them.
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5.5.5
Sample program
Introduction
This simple sample program shows how you use the transfer areas of an I-slave.
Requirement
You have configured an I-slave.
Task
The result of an "AND logic operation" of two inputs (preprocessing) in the I-slave is to be
provided to the higher-level DP master. This result is to be assigned to a local output in the
DP master (further processing).
Use a transfer area with the following addresses for this purpose:
Address in the I-slave: Q568
Address in the DP master: I68
Required steps
The following steps are necessary to solve the task:
1. Configuring the transfer area
2. Programming the I-slave
3. Programming the DP master
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Configuring the transfer area
Configure a transfer area with the following properties in the I-slave:
Figure 5-17 Transfer area, I-slave sample program
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Programming the I-slave
To program the sample program for the I-slave, follow these steps:
1. Using the SCL programming language, create a new function with the name
"preprocessing" in the project tree under "Program blocks" > "Add new block". Open the
function.
2. In the interface of the function "preprocessing", create the following tags:
Name
Data type
Input/output type
input 1 bool Input
input 2 bool Input
result bool Output
3. In the instruction window of the function "preprocessing", write the following program
code:
#result:=#input 1&#input 2;
4. Call the function "preprocessing" in a cycle OB, for example, in OB1.
5. Wire the function "preprocessing" in the cycle OB as follows:
Figure 5-18 I-slave sample program
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Programming the DP master
To program the sample program for the DP master, follow these steps:
1. Using the SCL programming language, create a new function with the name "further
processing" in the project tree under "Program blocks" > "Add new block". Open the
function.
2. In the interface of the function "further processing", create the following tags:
Name
Data type
Input/output type
result bool Input
output bool Output
3. In the instruction window of the function "further processing", write the following program
code:
#output:=#result;
4. Call the function "further processing" in a cycle OB, for example, in OB1.
5. Wire the function "further processing" in the cycle OB as follows:
Figure 5-19 DP master sample program
Result
You mastered the task successfully.
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5.5.6
Diagnostics and interrupt behavior
Diagnostics and interrupt behavior
S7 CPUs have numerous diagnostics and interrupt functions that can, for example, report
errors/faults or failures of underlying DP systems. These diagnostics alarms reduce
downtimes and simplify localization and elimination of problems.
Diagnostics options in the higher-level DP master and in the I-slave
The following diagnostics mechanisms are available to the higher-level DP master and the
I-slave:
OB 82 (diagnostic interrupt)
When the I-slave changes mode, the DP master calls OB 82 (diagnostic interrupt).
When the DP master changes mode, the I-slave calls OB 82 (diagnostic interrupt).
OB 86 (rack failure)
If the bus connection to the I-slave is interrupted, the DP master calls OB 86
(rack failure).
If the bus connection to the DP master is interrupted, the I-slave calls OB 86
(rack failure).
OB 122 (I/O access error)
If you have not set the attribute "Handle errors within block" for OB 122, the following
applies:
If the bus connection to the I-slave is interrupted, the DP master calls OB 122
(I/O access error) if there is direct access to the relevant transfer areas.
If the bus connection to the DP master is interrupted, the I-slave calls OB 122
(I/O access error) if there is direct access to the relevant transfer areas.
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Reaction of the transfer areas to mode changes
Table 5- 3 Reaction of the transfer areas to mode changes
DP master
I-slave
Reaction of DP master input transfer areas
Reaction of I-slave input transfer areas
RUN→STOP RUN No updating of the process image The input transfer areas retain their current
values. (no access error)
STOP→RUN RUN The input transfer areas are updated by the
cyclic user program via the process image.
The input transfer areas are updated via the
process image.
RUN RUN→STOP The I-slave sets the input transfer areas on
the DP master to "0".
No updating of the process image
RUN STOP→RUN The I-slave sets the input transfer areas on
the DP master to "0".
After the startup program of the I-slave, the
input transfer areas of the DP master are
updated via the process image.
Prior to processing of the startup program,
the input transfer areas are updated via the
process image.
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A
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wide range of different users in all sectors of the manufacturing and process industry.
To accompany our products and systems, we offer integrated and structured services that
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even across continents ensure reliable service in the most diverse areas.
Service & Support
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Online Support
The comprehensive online information platform supports you in all aspects of our Service &
Support at any time and from any location in the world.
You can find Online Support on the Internet at the following address: Internet
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Glossary
Automation system
Programmable logic controller for the open-loop and closed-loop control of process chains of
the process engineering industry and manufacturing technology. The automation system
consists of different components and integrated system functions according to the
automation task.
Bus
A common transfer route to which all nodes are connected; it has two defined ends.
In the case of PROFIBUS, the bus is a two-wire line or a fiber-optic cable.
Bus connector
Physical connection between the node and bus cable.
Bus system
All stations physically connected to a bus cable form a bus system.
Device
In the PROFIBUS environment, "device" is the generic term for:
Automation systems (for example, PLC, PC)
Distributed I/O systems
Field devices (for example, hydraulic devices, pneumatic devices)
Active network components
Gateways to AS interface or other fieldbus systems
Device that can send, receive or amplify data via the bus, for example, a DP slave by means
of PROFIBUS DP.
Glossary
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Device
In the PROFIBUS environment, "device" is the generic term for:
Automation systems (for example, PLC, PC)
Distributed I/O systems
Field devices (for example, hydraulic devices, pneumatic devices)
Active network components
Gateways to AS interface or other fieldbus systems
Device that can send, receive or amplify data via the bus, for example, a DP slave by means
of PROFIBUS DP.
Diagnostics
Monitoring functions for the recognition, localization, classification, display and further
evaluation of errors, faults and alarms. They run automatically during plant operation. This
increases the availability of systems/plants by reducing commissioning times and
downtimes.
DP master
CPU or device that conducts the communication with the DP slaves according to a defined
algorithm. To do this, the DP master uses the functions for communication with the DP
slaves which are defined by PROFIBUS DP. It acts according to standard EN 50170, Part 3.
Master
DP slave
Slave in the distributed I/O that is operated on the PROFIBUS with PROFIBUS DP protocol
and acts according to standard EN 50170, Part 3. The DP slave is addressed by the DP
master and provides it with specified functions (I/O data, diagnostics, etc.).
Slave
DPV1
The designation DPV1 refers to the functional extension of acyclic services (to include new
interrupts, for example) provided by the DP protocol. The DPV1 functionality is integrated in
IEC 61158/EN 50170, Volume 2, PROFIBUS.
FDL
Fieldbus Data Link (bus access protocol). Step 2 with PROFIBUS.
HMI device
Human Machine Interface, device for visualization and control of automation processes.
Glossary
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HSA
Highest Station Address. A bus parameter for PROFIBUS. Outputs the highest PROFIBUS
address of an active device. PROFIBUS addresses greater than HSA are permitted for
passive devices, up to 126.
Industrial Ethernet
Guideline for setting up Ethernet in an industrial environment. The main difference to the
standard Ethernet is the mechanical current carrying capacity and interference immunity of
the individual components.
I-slave
The "I-slave" functionality of a CPU supports the exchange of data with a DP master and can
thus be used, for example, as intelligent preprocessing unit of partial processes. The I-slave
is connected in its role as DP slave to a "higher-level" DP master.
Master
A master device that is in possession of the token can send data to other devices and
request data from them (= active device).
PCF
Polymer Cladded Fiber (plastic-covered glass fiber)
POF
Polymer Optical Fiber (plastic fiber-optic cable made of light-conducting plastics)
Process image
Address area in the system memory of the DP master. At the start of the cyclic program the
signal states of the input modules are transmitted to the process image of the inputs. And the
end of cyclic program execution, the process image of the outputs is transmitted to the DP
slave as signal state.
PROFIBUS
PROcess FIeld BUS, in IEC 61158-2 as "Type 3" standardized, bit-serial fieldbus system.
The standard specifies functional, electrical and mechanical properties.
PROFIBUS is a bus system that networks automation systems and field devices compatible
with PROFIBUS at the cell and field level. PROFIBUS is available with the protocols DP
(= distributed I/O), FMS (= fieldbus message specification) or PA (process automation).
Glossary
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PROFIBUS address
Unique identification of a device connected to PROFIBUS. The PROFIBUS address is
transmitted in the frame for addressing a device. A PC or programming device has the
PROFIBUS address "0". DP masters and DP slaves have a PROFIBUS address in the range
from 1 to 125.
PROFIBUS device
A PROFIBUS device has at least one PROFIBUS interface with an electrical (RS 485) or
optical (Polymer Optical Fiber, POF) interface.
PROFIBUS DP
A PROFIBUS with DP protocol that complies with EN 50170. DP stands for distributed I/O
(fast, real-time capable, cyclic data exchange). From the perspective of the user program,
the distributed I/Os are addressed in exactly the same way as the centralized I/Os.
PROFINET
Open component-based industrial communication system based on Ethernet for distributed
automation systems. Communication technology promoted by the PROFIBUS Users
Organization.
RS 485
Asynchronous data transmission process for PROFIBUS DP to ANSI TIA/EIA-RS485-A.
RS 485 repeater
Equipment for amplifying bus signals and for coupling segments over long distances.
Segment
The bus line between two terminating resistors forms a bus segment.
A bus segment can contain up to 32 bus nodes. Segments can be coupled, for example, by
means of RS 485 repeaters or diagnostics repeaters.
Slave
Distributed device in a fieldbus system that may exchange data with a master after being
requested to do so by the master. Slaves are all DP slaves, for example, such asET 200SP,
ET 200MP, ET 200AL.
Glossary
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Standard mounting rail
Standardized metal profile to EN 50022.
The standard mounting rail is used for quick snap-on installation of network components,
such as OLM, repeaters, etc.
Subnet
Part of a network whose parameters must be synchronized with the devices
(e.g., with PROFIBUS). A subnet includes the bus components and all connected stations.
SynchronousCycle
Name for synchronous cycle interrupt OB in STEP 7.
Target-Rotation-Time (Ttr)
Bus parameter for PROFIBUS. The token is the send permission for a device on
PROFIBUS. A device compares a token rotation time it has measured with the Target-
Rotation-Time and controls the sending of frames with high priority or low priority based on
this comparison.
Terminating resistor
Component that terminates the ends of a data transmission line to prevent reflections in the
transmission medium.
Terminator
Terminating resistor of bus segments with transmission rates of 9.6 kbps to 12 Mbps. The
power supply is separate from the bus nodes.
TIA Portal
Totally Integrated Automation Portal
Topology
Structure of a network. Common structures are line topology, ring topology, star topology
and tree topology.
Transmission rate
Specifies the number of bits transmitted per second.
Watchdog
Mechanism for monitoring the readiness for operation.
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A
Acyclic data exchange, 74
Address assignment, 45
Addressing, 42
B
Bus connector
IP20, 22
M12 with IP65, 24
Bus parameters
Adapting, 50
Description, 52
Value ranges, 54
Bus profile, user-defined, 54
Bus terminal
M12, 24
RS 485, 24
C
Cable configuration, 49
Cables, 19
Calculate bus times, 51
CANopen module, 30
Communication
I/O communication, 14
Communication load, 51
Components, (See network components)
Configuration, 42
Configuring isochronous mode, 68
Basic procedure, 67
DP slave, 68
Requirements, 66
Updating the process image partition, 69
Connecting PROFIBUS DP with PROFINET IO, 41
Constant bus cycle time, 55
D
Data exchange between IO systems, 81
Diagnostic repeater
Cascade depth, 37
Diagnostics, 60
Topology, 37
Diagnostics, 57
Display alarms, 58
I-slave, 89
Isochronous mode, errors and remedies, 70
Diagnostics repeater
Description, 29
Display, diagnostic messages, 58
DP master
Operated as, 80
DP slave, 43
Operated as, 80
DP/AS-i F-Link, 31
DP/AS-i LINK Advanced, 31
DP/AS-Interface Link 20E, 31
DP/DP coupler, 30
DP/PA bus link, 31
E
Example of isochronous mode, 64
F
FastConnect system, 20
Fiber-optic, 27
Fiber-optic cables, 25
Glass, 27
Optical ring, 49
PCF, 26
Plastic, 26
G
GAP factor, 54
H
Hardware
Configuring, 42
Parameter assignment, 42
Index
PROFIBUS with STEP 7 V13
100 Function Manual, 12/2014, A5E03775446-AC
I
I/O addresses, 69
I/O communication, 14
Identification and maintenance data (I&M data), 61
IE/PB Link PN, 30
Increasing DP cycle time, 56
Installation, 17
Active network components, 29
Bus connection, 22
Cables, 19
FastConnect, 20
Topology, 35
Interrupt OBs, 77
Interrupts
DPV1, 77
Isochronous mode, 70
IO system
Data exchange, 81
I-slave (intelligent DP slave)
Diagnostics, 89
Interrupt behavior, 89
Isochronous mode
Change parameters, 71
Description, 62
Diagnostics, 70
Dialog box for isochronous mode, 71
Example, 64
Interrupts, 70
Sequence, in principle, 65
IWLAN/PB Link PN IO, 30, 40
M
M12
Bus connector, 24
Bus terminating resistor, 24
M12 bus terminating resistor, 24
Maximum cable lengths
Maximum cable lengths, 20
N
Network, 18
electrical, conducted, 29
Optical, 33
optical, electrical, 18
Selection criteria, 18
Topology, 35
Network components
Bus connections, 20
CANopen module, 30
Diagnostics repeater, 29
DP/AS-i F-Link, 31
DP/AS-i LINK Advanced, 31
DP/AS-Interface Link 20E, 31
DP/DP coupler, 30
Fiber-optic cables, 25
IE/PB Link PN, 30
IWLAN/PB Link PN IO, 30
OBT, Optical Bus Terminal, 33
OLM, Optical Link Module, 33
PROFIBUS terminator, 30
RS 485 cables, 19
RS485, 29
Network settings, 46
O
Optical Bus Terminal, OBT, 33
Optical Link Module, OLM
Description, 33
Topology, 40
Optical ring, 49, 50
P
Parameter assignment, 42
Process image partition, 69
PROFIBUS
Address, 45
Devices, 12
Installation, 17
PROFIBUS DP, 11
Protocols, 10
RS 485 cables, 19
PROFIBUS address, 45
Change, 45
HSA, 46
PROFIBUS DP
Applications, 11
Assigning the DP slave, 43
Connecting with PROFINET, 41
Definition, 10
Devices and designations, 13
Interface, 16
PROFIBUS DP interface
Properties, 16
Representation in STEP 7, 16
PROFIBUS terminator, 30
Profiles for network settings
DP, Standard, 46
User-defined, 48
Index
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC 101
PROFINET Proxy functionality, 41
Programming isochronous mode, 70
R
Retry limit, 50, 54
RS 485 cables, 20
RS485 repeater
Description, 29
Topology, 35
S
Slot time, 50, 54
SYNC/FREEZE, 75
Synchronization, sequence, 65
Synchronous cycle interrupt, 69
Synchronous cycle interrupt OB,
SynchronousCycle, 70
SynchronousCycle, synchronous cycle interrupt OB, 70
T
Target Rotation Time, 54
Topology
Connecting PROFIBUS DP with PROFINET, 41
OLM, 40
RS485 repeater, 35
WLAN, 40