CJ-series Serial Communications Units CJ1W-SCU CSM_CJ1W-SCU_DS_E_7_1 The Serial Communications Units That Enable High-speed Connections with External Devices * Each Serial Communications Unit provides two serial communications ports: RS-232C and RS-422A/485, and the serial communications mode can be set separately for each port from Protocol Macro, Host Link, NT Link, Serial Gateway, and No-protocol. CJ1W-SCU22 CJ1W-SCU32 CJ1W-SCU42 Features * Mount a total of up to 16 CPU Bus Units, including these Serial Communications Units, to the CPU Rack or Expansion Racks to create systems with up to 32 serial communications ports. * Connect an NT-AL001 RS-232C/RS-442A Link Adapter to the RS-232C port to enable 1:N communications. * With the CJ1W-SCU@2, you can use a faster baud rate (up to 230.4 kbps) and faster data transfer to the CPU Unit to enable connecting to high-speed external devices. System Configuration Programing Devices Host Computer Modbus-RTU Master (Host computers) or Serial Communications Units CPU Unit Programmable Terminal (PT) RS-232C/RS-422A Adapter NT-AL001 Protocol Macro General-purpose External Device No-protocol General-purpose External Device Serial Gateway (Host Link(FINS)) CJ-series Controller (Host Link slave) Serial Gateway (Compoway/F) Temperature Controller Smart Sensor 1 CJ1W-SCU Ordering Infomation International Standards * The standards are abbreviated as follows: U: UL, U1: UL(Class I Division 2 Products for Hazardous Locations), C: CSA, UC: cULus, UC1: cULus (Class I Division 2 Products for Hazardous Locations), CU: cUL, N: NK, L: Lloyd, and CE: EC Directives. * Contact your OMRON representative for further details and applicable conditions for these standards. Specifications Unit type CJ1 CPU Bus Units Product name Communications Interface Communications functions Serial Communications Units No. of unit numbers allocated The following functions can be selected for each port with an CJsystem: * Protocol macro * Host Link * NT Links (1:N mode) * Serial Gateway * No-protocol *3 * Modbus-RTU Slave High-speed type 2 RS-232C ports Current consumption (A) 5V 24V 0.28 *1 -- Model Standards CJ1W-SCU22 *2 UC1, N, L, CE 1 The following functions can be 2 RS-422A/485 ports selected for each port with an NJsystem: * Protocol macro * Serial Gateway * No-protocol 1 RS-232C port and * Modbus-RTU Slave 1 RS-422A/485 port CJ1 CPU Bus Units Serial Communications Units The following functions can be selected for each port: * Protocol macro *4 * Host Link * NT Links (1:N mode) 2 RS-422A/485 ports * Serial Gateway *5 * No-protocol *6 * Modbus-RTU Slave *7 1 RS-232C port and 1 RS-422A/485 port 2 RS-232C ports 1 0.40 -- CJ1W-SCU32 *2 0.36 *1 -- CJ1W-SCU42 *2 0.28 *1 -- CJ1W-SCU21-V1 *8 0.38 -- CJ1W-SCU31-V1 *8 0.38 *1 -- CJ1W-SCU41-V1 *8 UC1, N, L, CE *1. When an NT-AL001 RS-232C/RS-422A Conversion Unit is used, this value increases by 0.15 A/Unit. *2. Sinple Backup Function and Interrupt notification function cannot be used with an NJ-system. *3. A Serial Communications Unit with unit version 2.1 or later, a CPU Unit with unit version 1.03 orlater, and Sysmac Studio version 1.04 or higher are required to use the SerialRcvNoClear instruction. *4. You can activate Protocol macro trace function when the CPU Unit is set to the RUN/MONITOR mode. (MONITOR mode is not available with the NJ-series CPU Units.) *5. The Serial Gateway function is enabled only for Serial Communications Units of unit version 1.2 and later. *6. The no-protocol function is enabled only for Serial Communications Units of unit version 1.2 and later (and a CPU Unit of unit version 3.0 or later is also required). *7. The Modbus-RTU Slave function is enabled only for Serial Communications Units of unit version 1.3 and later. *8. This unit cannot be used, with the Machine Automation Controller NJ-series. Accessories Model Accessories Specifications CJ1W-SCU22 2 Serial Port (RS-232C) Connector Connector set for serial port connection (D-SUB 9-pin male connector) CJ1W-SCU32 2 Serial Port (RS-422A/485) Connector Terminal Block Connector (FMC1.5/5-STF-3.5AU by Phoenix Contact) CJ1W-SCU42 CJ1W-SCU21-V1 CJ1W-SCU31-V1 CJ1W-SCU41-V1 1 Serial Port (RS-232C) Connector Connector set for serial port connection (D-SUB 9-pin male connector) 1 Serial Port (RS-422A/485) Connector Terminal Block Connector (FMC1.5/5-STF-3.5AU by Phoenix Contact) 2 Serial Port (RS-232C) Connector Connector set for serial port connection (D-SUB 9-pin male connector) Mountable Racks NJ system Model CJ1W-SCU22 Unit version 2.0 CJ1W-SCU32 Unit version 2.0 CJ1W-SCU42 Unit version 2.0 CJ1W-SCU21-V1 Unit version 1.3 CJ1W-SCU31-V1 Unit version 1.3 CJ1W-SCU41-V1 Unit version 1.3 CPU Rack *4 Expansion Rack *4 10 Units 10 Units (per Expansion Backplane) CJ system (CJ1, CJ2) CPU Rack Expansion Backplane 10 Units *1 10 Units *2 (per Expansion Backplane) CP1H system NSJ system CP1H PLC NSJ Controller Expansion Backplane 2 Units *3 Not supported 10 Units *2 (per Expansion Backplane) Not supported Note: It may not be possible to mount this many Units to a Rack depending on the current consumption of the other Units. *1. This is the number of Units for a CJ2H-CPU6@ CJ2H CPU Unit (without EtherNet/IP) and a CJ1W-PA205@ or CJ1W-PD025 Power Supply Unit. (When not using NT-AL001) *2. This is the number of Units for a CJ1W-PA205@ or CJ1W-PD025 Power Supply Unit. *3. A CP1W-EXT01 CJ Unit Adaptor is required *4. A total of up to 16 Units, including all other CPU Bus Units. 2 CJ1W-SCU Specifications Item Description Device name Serial Communications Unit Classification CPU Bus Unit Model number Serial ports Protocol Number of mountable Units CJ1W-SCU22 CJ1W-SCU32 CJ1W-SCU42 CJ1W-SCU21-V1 CJ1W-SCU31-V1 CJ1W-SCU41-V1 Port 1 RS-232C RS-422A/485 RS-422A/485 RS-232C RS-422A/485 RS-422A/485 Port 2 RS-232C RS-422A/485 RS-232C RS-232C RS-422A/485 RS-232C Port 1 Host Link, protocol macro, Serial Gateway, No-protocol, NT Link, Host Link, protocol macro, NT Link, or loopback test can be Modbus-RTU Slave, loopback test , or 1:1 Host Link can be se- selected for each port. lected for each port. *1 *2 * Unit Ver. 1.2 or later also supports Serial Gateway, no-protocol, and 1:1 Host Link modes. (Note: The Serial Gateway can also be executed in protocol macro mode.) *1 * Unit Ver. 1.3 or later also supports Modbus-RTU slave mode. Port 2 CPU Unit None CPU Rack A total of up to 16 Units, including all other CPU Bus Units. No restrictions on the mounting location. However, if an external interrupt task is used, the Unit must be mounted in one of the following slots on the CPU Rack. * CJ2H-CPU6@-EIP CPU Unit: Slots 0 to 3 A total of up to 16 Units, including all other CPU Bus Units. No * CJ2H-CPU6@, CJ2M-CPU@@ or CJ1G/H-CPU@@H CPU Unit: restrictions on the mounting location. Slots 0 to 4 * CJ1M-CPU@@ CPU Unit: Slots 0 to 2 External interrupt tasks will not be started if the Unit is mounted to any other slot. Expansion Rack Ordinary refreshing of software Allocated 25 words of the 25 words in the CPU Bus Unit CIO Area (constant data exchange with the CPU Unit) switches and status Data exchange with the CPU Unit Transfer from the CPU Unit set by the system Simple Backup Function Of the CPU Bus Unit DM Area, each serial port is allocated 10 words (total 20 words). Data is transferred from the CPU Unit at the following times: * Startup or restart * Ladder instruction: STUP(237) * Port Settings Changing Flag turns ON (Auxiliary Area) The CPU Unit's Simple Backup Function can be used to backup the Protocol Macro data in the Serial Communications Unit to the CPU Unit's Memory Card. The backed-up data can be restored or compared. (The Simple Backup Function can be used with the CJ1-H and CJ1M CPU Units only.) Current consumption *3 280mA+x 400mA 360mA+x 280mA+x 380mA 380mA+x Weight 160g Max. 120g Max. 140g Max. 110g Max. 110g Max. 110g Max. General specifications Conforms to general specifications for CJ Serise. *1. Serial Gateway: The Serial Gateway can also be executed in protocol macro mode. *2. No-protocol: An external interrupt task can be executed when data is received in No-protocol Mode. If the CJ2H CPU Units with unit version 1.1 or later and CJ2M CPU Units is used, the high-speed communications instructions (DRXDU(261) and DTXDU(262)) can also be used. *3. The current consumption is for one Serial Communications Unit. When an NT-AL001 Link Adapter is connected to the Serial Communications Unit, power is supplied to the Link Adapter from the Unit. A current consumption of 0.15A must be added for each Link Adapter that is connected. In the above specifications, "x" indicates that 0.15A must be added for each port to which an NT-AL001 Link Adapter is connected to provide the required 5-V power supply. 3 CJ1W-SCU Protocol Specifications Host Link Specifications Item Description Communications mode Half-duplex (Full-duplex for slave-initiated communications) Synchronous mode Start-stop synchronization (asynchronous mode) Baud rate *1 RS-232C port and RS-422A/485 ports: 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps *2 Default setting: 9,600 bps Communications distance *1 RS-232C port : 15 m max. *3 RS-422A/485 Port : * CJ1W-SCU@1-V1 500 m max. (total cable length: 500 m max., T-branch branch lines: 10 m max.) * CJ1W-SCU@2 1,200 m max. (total cable length: 1,200 m max., Multidrop connections are possible. However, maximum cable length is 500 m if the NT-AL001 is used for RS-422A-485 connections.) Connection configuration RS-232C port : 1:1 (1:N (N = 32 Units max.) is possible using an Converting Link Adapters.) RS-422A/485 port : 1:N (N = 32 Units max.) Number of connected Units 32 Units max. (unit numbers 0 to 31; unit number 0 is set for 1:1 connection) C-mode commands Header: @, address: (host link unit number) 0 to 31 (BCD), data: header code + text, error check code: FCS, terminator: * +CR FINS commands Header: @, address: (host link unit number) 0 to 31 (BCD), data: header code (always "FA") + FINS header + FINS command + text, error check code: FCS, terminator: * +CR Frame structure Vertical parity: Even, odd. or none FCS (horizontal parity converted to ASCII) Error check codes Command flow Command flow and support Host computer to Controller Controller to host computer Commands Contents C-mode commands 1:1 or 1:N communications with directly connected Controller *4 FINS commands 1:1 or 1:N communications with directly connected Controller. (in Host Link protocol) FINS commands Communications using SEND(090), RECV(098), and CMND(490) from CPU (in Host Link protocol) Unit. *5 *1. Confirm the baud rates and communications distance supported by connected devices. *2. The CJ1W-SCU@2 is required for communications at 230,400 bps. *3. The maximum cable length for RS-232C is 15 m. The RS-232C standard, however, does not cover baud rates above 19.2 Kbps. Refer to the manual for the device being connected to confirm support. *4. The specified frame format must be prepared on the host computer and then sent. *5. The host computer must interpret the commands and return a response in the correct format. Connection between the host computer and Controller must be 1:1. Protocol Macro Function Specifications Item Number of protocols 20 max. Number of sequences 1,000 max. Per protocol Description Can be created and registered with the Protocol Support Tool (CX-Protocol). Number of sequences 60 max. Number of messages 300 max. Number of reception matrixes 100 max. Sequence execution condition Using the CPU Unit's PMCR (260) instruction (specifying the sequence number) Communications mode Half-duplex or full-duplex Synchronous mode Start-stop synchronization (asynchronous mode) Baud rate *1 RS-232C port and RS-422A/485 ports: 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps Default setting: 9,600 bps *2 Communications distance *1 RS-232C port : 15 m max. RS-422A/485 port : * CJ1W-SCU@1-V1 500 m max. (total cable length: 500 m max., T-branch branch lines: 10 m max.) * CJ1W-SCU@2 1,200 m max. (total cable length: 1,200 m max., Multidrop connections are possible. However, maximum cable length is 500 m if the NT-AL001 is used for RS-422A-485 connections.) Connection configuration RS-232C port : 1:1 (1:N (N = 32 Units max.) is possible using a Converting Link Adapter.) RS-422A/485 port : 1:N (N = 32 Units max.) Number of connected Units 32 Units max. (unit numbers 0 to 31; unit number 0 is set for 1:1 connection) Maximum number of data exchange words between Controller and protocol macro function Including the word that specifies the number of words (1 word) Operand setting 250 words Link word setting 500 words O1, O2, I1, and I2: 500 words total Direct setting 500 words Maximum number of words per data attribute 4 CJ1W-SCU Item Description Number of steps per sequence 16 max. Transmission control parameters X-on/X-off flow, RS/CS flow, delimiter control, or contention control, and modem control can be selected. Scan notification: Writes the receive data to I/O memory during CPU Unit scanning. Sequence contents (step common parameters) Step contents Response notification method (operand) Scan method (fixed) Support Interrupt notification Not support Interrupt notification for reception case number Not suppprt Monitoring time during send/receive processing Receive wait, receive completion, or send completion can be monitored. Setting range: 0.01 to 0.99 s, 0.1 to 9.9 s, 1 to 99 s, or 1 to 99 minutes Link word setting Area in which data is exchanged between the CPU Unit and the Serial Communications Unit during Communications Unit refreshing. Two areas are possible for each device: An area for storing receive data and an area for storing send data. *3 Commands Send only (SEND), receive only (RECV), send and receive (SEND&RECV), wait (WAIT), reception buffer clear (FLUSH), ER-ON (OPEN), or ER-OFF (CLOSE) Repeat counter 1 to 255 times Retry count 0 to 9 (Only when the command is SEND&RECV) Send wait time 0.01 to 0.99 s, 0.1 to 9.9 s, 1 to 99 s, or 1 to 99 minutes (Only when the command is SEND or SEND&RECV) With or without response write (operand) When receive processing is completed (when the receive data is stored in the area specified in the 4th operand of the PMCR(260) instruction), whether or not to store the received messages can be selected. Next processing When a step has ended normally, End (sequence completed), Next (proceed to the next step No.), Goto (go to the specified step No.), or Abort (interrupt the step and terminate that sequence) can be selected. Error processing When a step has ended abnormally, End, Next, Goto, or Abort can be selected. Send message Data sent to the specified address when the command is SEND or SEND&RECV. Receive message Data sent from the specified address when the command is RECV or SEND&RECV. Reception matrix When the command is RECV or SEND&RECV, sets the expected receive messages (15 max.), and switches to the next processing according to the message received. Header and terminator data attributes Consists of a header, address, length, data, error check code, and terminator. Specifies the receive messages and the next processing for each of cases No. 00 to No. 15. Of the maximum 16 cases, one case must be set as "Other" in the receive messages (in addition to the set receive messages). Constant ASCII data, hexadecimal data, or control code Constant ASCII data, hexadecimal data, or control code (with an address, no control code is possible) No conversion, conversion to ASCII data, or conversion to hexadecimal data (the read/write direction can be specified) Designa- (X, Y) tion X: Effective address (where read from, or where written to) method Y: Data size (1 to 1,000) *4 Message unit contents Data attributes of addresses and data in send/receive messages Word read (I/O memory to send data) Variable Specify using a link word. I/O memory direct designation Word designation X Specify using the 3rd operand of the PMCR(260) instruction. Word write (receive data to I/O memory) Specify using the 4th operand of the PMCR(260) instruction. Set leading address + n (The linear expression aN + b, including repeat counter N, is also possible for n.) Specify using a link word. I/O memory direct designation Wild card * Repeat counter N Any data or address can be received (only in receive messages) 5 CJ1W-SCU Item Description Data attributes of addresses and data in send/receive messages Variable Linear expression including aN+b repeat counter a: 0 to 1000; b: 1 to 1000 N: Repeat counter value Wild card Can be received regardless of the length (only in receive messages) * Y Word read Word designa(I/O memory to send tion data) Message unit contents Specify using the 3rd operand of the Set leading address + n PMCR(260) instruction. (The linear expression Specify using a link aN + b, including word. repeat counter N, is also possible for n.) I/O memory direct designation Error check codes LRC, LRC2, CRC-CCITT, CRC-16, SUM, SUM1, and SUM2 can be calculated. Maximum length of send/receive messages 1,000 bytes. (A maximum length between 200 and 1,000 bytes can be set in the Setup Area.) Maximum number of data attributes registered in one message 96 attributes *5 Maximum number of write data attributes registered in one message 30 attributes *6 * A total of up to 1,700 bytes (characters) of time-series data can be traced in send and receive messages. * Changes to the step No. and control signals such as RS and CS can also be traced. Trace function *7 *1. The baud rate and the communications distance sometimes depend on the remote device. *2. A baud rate of 57,600 bps can be selected when using Unit Ver. 1.2 or later (115,200 bps is not possible). The CJ1W-SCU@2 is required for communications at 115,200 or 230,400 bps. *3. Unit Ver. 1.2 or later supports continuous I/O refreshing in addition to the previous on-request I/O refreshing. *4. The data size is the number of bytes on the transmission path. *5. The CX-Protocol can be used to register up to 96 attributes per message. *6. A macro syntax error will occur when the protocol macro is executed if more than 31 write attributes are registered in one message. *7. The CPU Unit is set to the RUN/MONITOR mode. (MONITOR mode is not available with the NJ-series CPU Units.) Note: When using 2-wire RS-422A/485 communications in Protocol Macro Mode, set only modem controls for the send control parameters, and do not use RS/CS flow controls. Serial Gateway Specifications Item Description Conversion source FINS commands (received through network (including Host Link FINS) or CPU bus) Conversion functions * The received FINS command sent to the Unit's serial port is converted according to the FINS command code as follows: 2803 hex: FIN header removed and converted to Compo-Way/F command. 2804 hex: FIN header removed and converted to Modbus-RTU command. 2805 hex: FIN header removed and converted to Modbus-ASCII command. The converted command is sent to the serial port. * When the received FINS command is sent to the Unit (user-specified FINS command code), the FINS command is enclosed in a Host Link header and terminator. Converted format * * * * Enabled serial communications mode Serial Gateway mode or protocol macro mode Queuing functions Up to five FINS commands can be converted and then queued for processing. Protocol macro execution processing When a FINS command is received during protocol macro execution, the Serial Gateway is executed using an interrupt between steps in the communications sequence. If the next step is a RECEIVE command, the Serial Gateway will not be executed until the next step. For other conditions, the interrupt is executed immediately. *1 Response timeout monitoring The time is monitored from when the message is converted into the specified protocol using the Serial Gateway until the response is received (in Serial Gateway mode or protocol macro mode). Default: 5 s (setting range: 0.1 to 25.5 s) *2 Send start timeout monitoring The time is monitored from when the FINS command is received until it is converted into the specified protocol and starts to be sent (in protocol macro mode only). Default: 5 s (setting range: 0.1 to 25.5 s) *3 Send delay The time can be set from when the message is converted into another protocol using Serial Gateway conversion until the data is actually sent. (Serial Gateway or protocol macro mode) Default: 0 s (setting range: 0.01 to 300.00 s) CompoWay/F commands Modbus-RTU commands Modbus-ASCII commands Host Link FINS commands *1. The reception buffer is cleared during Serial Gateway execution. The Serial Gateway can be prohibited in protocol macro mode by turning ON the Serial Gateway Prohibit Switch in the CIO Area. *2. When a timeout occurs, the FINS end code (0205 hex: Response timeout) is returned to the source of the FINS command and a response is received after a timeout occurs. *3. When a timeout occurs, the FINS end code (0204 hex: Remote node busy) is returned to the source of the FINS command. The send processing will not be executed and the received FINS command will be discarded. 6 CJ1W-SCU No-protocol Specifications Item Description Communications mode Full-duplex Baud rate *1 RS-232C port and RS-422A/485 ports: 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps *2 Default setting: 9,600 bps Communications distance *1 RS-232C port : 15 m max. RS-422A/485 port : * CJ1W-SCU@1-V1 500 m max. (total cable length: 500 m max., T-branch branch lines: 10 m max.) * CJ1W-SCU@2 1,200 m max. (total cable length: 1,200 m max., Multidrop connections are possible. However, maximum cable length is 500 m if the NT-AL001 is used for RS-422A-485 connections.) Messages (communications frame structure) Set either of the following types in the Setup Area in the allocation DM Area. 1. Data only (without start code and end code) 2. Start code + data 3. Data + end code 4. Start code + data + end code 5. Data + CR + LF 6. Start code + data +CR + LF Set in allocated DM Area (The start code can be included by setting it to between 00 and FF hex, and the end code can be included by setting it to between 00 and FF hex. To exclude the end code, set the number of receive data bytes.) Start code Sending messages Receiving messages None or 00 to FF hex End code None, 00 to FF hex, or CR + LF Number of receive data bytes during reception Set the number of receive data bytes between 1 and 256 bytes (according to the DM Area settings) when frame structure 1 or 2 above is used. CJ: TXDU(256) instruction *3 NJ: SerialSend instruction CJ: RXDU(255) instruction *3 NJ: SerialRcv or SerialRcvNoClear instruction *4 Maximum message length Sending and receiving: Up to 259 bytes including the start code and end code (up to 256 bytes excluding start/end codes) Data conversion No conversion Communications protocol None Message delay time CJ: When the TXD (236), TXDU (256) instruction is executed, after the send delay time, the data is sent from the port. *3 0 to 300 s (0 to 300,000 ms) (Can be set in 10-ms units depending on the DM Area settings) NJ: When the SerialSend instruction is executed, after the send delay time, the data is sent from the port. 0 to 300 s (0 to 300,000 ms) (Can be set in 10-ms units: Set in System Studio or by using a device variable for CJ-series Unit.) Receive counter The number of data bytes (0 to 256) received at the port can be counted. Reception buffer clear timing * CJ1W-SCU@1-V1 The reception buffer is cleared immediately after executing the RXD(235)/RXDU(255) instruction * CJ1W-SCU@2 With the DRXDU(261) instruction, you can specify whether the reception buffers will be cleared or not in a setting in the DM Area words allocated to the Unit. *3 * NJ: SerialRcv instruction: After reading the receive data SerialRcvNoClear instruction: When the receive data size variable (Size) is set to 0 *4 *1. The baud rate and the communications distance sometimes depend on the remote device. *2. The CJ1W-SCU@2 is required for communications at 115,200 or 230,400 bps. *3. The DTXDU (262) and DRXDU (261) instructions can be used only when a CJ1W-SCU@2 Serial Communications Unit is connected to the CJ2H CPU Units with unit version 1.1 or later and CJ2M CPU Units. *4. A Serial Communications Unit with unit version 2.1 or later, a CPU Unit with unit version 1.03 or later, and Sysmac Studio version 1.04 or higher are required to use the SerialRcvNoClear instruction. Modbus-RTU Specifications Item Description Mode Modbus-RTU slave mode *1 Baud rate 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps *2 Default: 19,200 bps Data length 8 bits Parity Odd, even, or none Default: Even Stop bits Odd or even parity :1 bit No parity : 2 bits Address setting range 1 to 247 (broadcasting: 0) Frame format Slave address : 1 byte Function code : 1 byte Data : 0 to 252 bytes CRC code : 2 bytes *1. Modbus-ASCII mode is not supported. *2. The CJ1W-SCU@2 is required for communications at 230,400 bps. 7 CJ1W-SCU Supported Commands Function code (hexadecimal) Function Modbus name 01 Reads multiple bits from the CIO, Work, Holding, or Auxiliary Area of I/O memory. Read Coils 02 Reads multiple bits from the CIO Area of I/O memory. Read Discrete Inputs 03 Reads multiple words from the DM or EM Area of I/O memory. Read Holding Registers 04 Reads multiple words from the CIO, Work, Holding, or Auxiliary Area of I/O memory. Read Input Registers 05 Writes a bit in I/O memory. Write Single Coil 06 Writes a word in the DM or EM Area of I/O memory. Write Single Register 08 Executes an echoback test. Diagnostic 0F Writes multiple bits in I/O memory. Write Multiple Coils 10 Writes multiple words in the DM or EM Area of I/O memory. Write Multiple Registers Unit Version and Manufacturing Dates/Lot Numbers CJ1W-SCU@1-V1 Classification Type Model CJ1W-SCU21-V1 CPU Bus Units Support Software May 2004 June 2004 November 2005 Per-Ver 1.2 Unit version 1.2 Unit version 1.3 (Lot No:040617 and later) CJ1W-SCU31-V1 -- -- Unit version 1.3 * -- Ver.4.0 or earlier Ver.5.0 Ver.6.1 Ver.1.4 or earlier Ver.1.5 Ver.1.7 Serial Communications Units CJ1W-SCU41-V1 CX-Programmer CX-Protocol -- * Available April, 2006 CJ1W-SCU@2 Classification Type Model September 2009 September 2012 CJ1W-SCU22 CPU Bus Units Serial Communications Units CJ1W-SCU32 Unit version 2.0 Unit version 2.1 *1 CJ1W-SCU42 Support Software Machine Automation Controller CX-Programmer -- Ver.8.3 or higher CX-Protocol -- Ver.1.9 or higher Sysmac Studio SYSMAC-SE Ver.1.04 or higher NJ5- Ver.1.00 or earlier * NJ3- Ver.1.01 or earlier * CPU Unit * A Serial Communications Unit with unit version 2.1 or later, a CPU Unit with unit version 1.03 or later, and Sysmac Studio version 1.04 or higher are required to use the SerialRcvNoClear instruction. 8 CJ1W-SCU Function Support by Unit Version Function Support by Unit Version 2.1 Unit version Unit version 2.1 CJ1W-SCU22 CJ Series Serial Communications Units model CJ1W-SCU32 Functions CJ1W-SCU42 Noprotocol NJ: SerialRcvNoClear instruction Supported Function Support by Unit Version 2.0 Product Unit version 2.0 CJ1W-SCU22 CJ Series Serial Communications Units CJ1W-SCU32 CJ1W-SCU42 Serial gateway Functions Host Link Supported 1:1 links Supported Host Link compatible device selection Supported No-protocol Protocol macro Supported Link word specification data exchange timing On-request I/O refreshing Continuous I/O refreshing Reception buffer processing for PMCR(260) instruction execution Select to clear or hold contents. Baud rate (bps) 230,400 supported. Standard system protocol additions Supported MODBUS slave protocol added Supported Function Support by Unit Version 1.2 and Unit Version 1.3 Earlier version (pre-ver. 1.2) Product CJ Series CJ1W-SCU21 CJ1W-SCU21-V1 CJ1W-SCU21-V1 -- CJ1W-SCU31-V1 CJ1W-SCU41 CJ1W-SCU41-V1 CJ1W-SCU41-V1 Not supported Supported Supported 1:1 links Not supported Supported Supported Host Link compatible device selection Not supported Supported Supported No-protocol Functions Unit version 1.3 -- Serial Communications Units Serial gateway Host Link Unit version 1.2 Not supported Supported Supported Link word specification data exchange timing On-request I/O refreshing only On-request I/O refreshing Continuous I/O refreshing On-request I/O refreshing Continuous I/O refreshing Reception buffer processing for PMCR(260) instruction execution Clearing only Select to clear or hold contents. Select to clear or hold contents. Baud rate (bps) 38,400 max. (57,600 and 115,200 not supported) 57,600 supported. Standard system protocol additions Not supported Supported Supported MODBUS slave protocol added -- -- Supported Protocol macro 57,600 supported. Note: Make sure that a CJ-series CPU Unit with unit version 3.0 or later is used when using no-protocol mode. 9 CJ1W-SCU External Interface Serial Communications Units provide two communications ports for external interface: RS-232C and/or RS-422A/485 ports. CJ1W-SCU41-V1 RUN ERC SD1 RD1 RDY ERH SD2 RD2 SCU41-V1 RUN ERC SD1 RD1 TER1 RDY ERH SD2 RD2 Indicators ON WIRE 2 4 3456 F 012 F 012 BCDE PORT1 TERM OFF BCDE Unit number switch RUN ERC SD1 RD1 TER1 RDY ERH SD2 RD2 UNIT NO. PORT1 (RS422 /485) Port 1: RS-232C Terminating resistance switch Unit number switch 2-wire/4-wire switch Port 1: RS-422A/485 Indicators TERM OFF ON WIRE 2 4 3456 789A UNIT NO. 789A 789A 3456 SCU42 Indicators F 012 SCU21-V1 CJ1W-SCU42 BCDE CJ1W-SCU21-V1/SCU22 UNIT NO. PORT1 (RS422 RDA- /485) RDA+ SDA- PORT2 SCU31-V1 RUN ERC SD1 Port 2: RS-232C SCU32 RD1 TER1 RUN ERC SD1 RD1 TER1 RDY ERH SD2 RD2 TER2 UNIT NO. Terminating resistance switch (for port 1) ON WIRE 2 4 3456 Unit number switch PORT1 (RS422 /485) 2-wire/4-wire switch (for port 1) Port 1: RS-422A/485 PORT2 (RS422 /485) Port 2: RS-422A/485 TERM OFF WIRE 2 TERM OFF F 012 F 012 4 BCDE WIRE 2 3456 Indicators ON 4 789A ON 789A TERM OFF RD2 TER2 BCDE SD2 ERH Port 2: RS-232C CJ1W-SCU32 Indicators RDY 2-wire/4-wire switch PORT2 Port 2: RS-232C CJ1W-SCU31-V1 Unit number switch Port1: RS-422A/485 terminal-block Connector SDA+ FG PORT2 Terminating resistance switch RDARDA+ UNIT NO. Magnified view of bottom-right corner<CJ1W-SCU3 (-V1) only> Unit number switch PORT1 (RS422 /485) 2-wire/4-wire switch (for port 1) SDASDA+ FG Port1: RS-422A/485 terminal-block Connector PORT2 (RS422 RDA- /485) RDA+ SDASDA+ FG Terminating resistance switch (for port 1) TERM OFF WIRE 2 ON Port2: RS-422A/485 terminal-block Connector Terminating resistance switch (for port 2) 2-wire/4-wire switch (for port 2) 4 10 CJ1W-SCU Specifications of the RS-232C port and RS-422A/485 port RS-232C Port Protocol Host Link Protocol macro Communications method Full-duplex Synchronization Start-stop synchronization (asynchronous) Baud rate 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps *1 Connections 1:1 (1:N is possible using Link Adapters) Transmission distance 15 m max. *3 Interface Complies with EIA RS-232C Protocol 1:N NT Links Full-duplex or half-duplex No-protocol Half-duplex Standard NT link or high-speed NT link *2 Serial Gateway Modbus-RTU Communications method Full-duplex -- -- Synchronization -- -- -- Baud rate 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/ 230,400 bps *1 Connections 1:1 (1:N is possible using Link Adapters) Transmission distance 15 m max. *3 Interface Complies with EIA RS-232C *1. The CJ1W-SCU@2 is required for communications at 230,400 bps. *2. High-speed NT link is only available with Serial Communications Units manufactured on or after December 20th, 1999. With earlier models, only standard NT link is available. *3. The maximum cable length for RS-232C is 15 m. The RS-232C standard, however, does not cover baud rates above 19.2 Kbps. Refer to the manual for the device being connected to confirm support. Connector Pin Layout Pin No. Abbreviation 1 *1 FG Signal name Shield 2 SD Send data 3 RD Receive data 4 *2 RTS (RS) Request to send 5 *2 CTS (CS) Clear to send 6 *3 5V Power supply 7 *2 DSR (DR) 8 *2 DTR (ER) Data set ready *4 Data terminal ready I/O -- 9 5 Output Input Output Input -- 6 1 Input Output 9 SG Signal ground -- Shell *1 FG Shield -- *1. Pin No. 1 and the shell are connected to the ground terminal (GR) of the Power Supply Unit inside of the Serial Communications Unit. Therefore, the cable shield can be grounded by grounding the GR of the Power Supply Unit. *2. The status of the RTS (RS), CTS (CS), DSR (DR), and DTR (ER) signals can be monitored in the words allocated in the CIO Area. For details, refer to 2-3 I/O Memory Allocations. *3. Pin 6 (5 V) is required when the NT-AL001 Link Adapter is connected. *4. The DSR signal is used to monitor the signal cable. It can also be used as a CD (carrier detect) signal. (The DSR signal does not affect system operation, and is available for use by the user.) Note: Do not connect the 5-V power supply of Pin 6 to any external device other than an NT-AL001 Link Adapter. Otherwise, the external device and the Serial Communications Unit may be damaged. The following cables are provided for connection to NT-AL001 Link Adapters. We recommend that these cables be used. NT-AL001 connecting cables: XW2Z-070T-1 (0.7 m) XW2Z-200T-1 (2 m) Applicable Connectors Plug : XM3A-0921 (manufactured by OMRON) or equivalent Hood : XM2S-0911-E (manufactured by OMRON) or equivalent One plug and one hood are provided for each port. Recommended Cables UL2426 AWG28 x 5P IFS-RVV-SB (UL-approved, Fujikura Ltd.) AWG28 x 5P IFVV-SB (not UL-approved, Fujikura Ltd.) UL2426-SB (MA) 5P x 28AWG (7/0.127) (UL-approved, Hitachi Metals, Ltd.) CO-MA-VV-SB 5P x 28AWG (7/0.127) (not UL-approved, Hitachi Metals, Ltd.) Cable length: 15 m max. 11 CJ1W-SCU RS-422A/485 Port Protocol Host Link Protocol macro 1:N NT Links Communications method Full-duplex Synchronization Start-stop synchronous (asynchronous) Baud rate 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps *1 Standard NT link or high-speed NT link *2 Connections 1:N (N: 32 Units max.) 1:N (N: 8 Units max.) Transmission distance 500 m max. (The total combined cable length is 500 m max. Tbranch lines must be a maximum of 10 m long.) Interface Complies with EIA RS-485 Protocol Full-duplex or half-duplex No-protocol Half-duplex Serial Gateway Modbus-RTU Communications method Full-duplex -- -- Synchronization -- -- -- Baud rate 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/ 230,400 bps *1 Connections 1:N (N: 32 Units max.) Transmission distance 500 m max. (The total combined cable length is 500 m max. Tbranch lines must be a maximum of 10 m long.) Interface Complies with EIA RS-485 *1. The CJ1W-SCU@2 is required for communications at 230,400 bps. *2. High-speed NT link is only available with Serial Communications Units manufactured on or after December 20th, 1999. With earlier models, only standard NT link is available. Connector Pin Layout (CJ1W-SCU31-V1/SCU41-V1) Pin No. Abbreviation 1 *1 SDA 2 *1 SDB Signal name I/O Send data - Output Send data + Output 3 NC Not used -- 4 NC Not used -- 5 NC Not used 6 *1 7 8 *1 RDA NC RDB Receive data Not used Receive data + 9 5 -- Input 6 1 -- Input 9 NC Not used -- Shell *2 FG Shield -- *1. When 2-wire connections are used, use Pins 1 and 2, or Pins 6 and 8. *2. The shell is connected to the ground terminal (GR) of the Power Supply Unit inside of the Serial Communications Unit. Therefore, the cable shield can be grounded by grounding the GR of the Power Supply Unit. Note: With SDA/B or RDA/B, the signal polarity may be reversed by the remote device. Be sure to check the polarity before wiring. Applicable Connectors Plug : XM3A-0921 (OMRON) or equivalent Hood : XM2S-0911-E (OMRON) or equivalent One plug and one hood are provided for each port. Recommended Cables CO-HC-ESV-3P x 7/0.2 (manufactured by Hirakawa Hewtech Corp.) Cable length: 500 m max. (The total combined cable length is 500 m max. Tbranch lines must be a maximum of 10 m long.) 12 CJ1W-SCU Connector Pin Layout (CJ1W-SCU32/SCU42) Pin No. Abbreviation 1 *1 RDA Signal name Receive data- I/O Input 2 *1 RDB Receive data+ 3 *1 SDA Send data- Output 4 *1 SDB Send data+ Output 5 *2 FG Shield Input -- *1. For 2-wire connections, use either pins 1 and 2 or pins 3 and 4. *2. Pin 5 (the shield) is connected to the GR terminal on the Power Supply Unit though the Serial Communications Unit. The cable shield can thus be grounded by grounding the GR terminal of the Power Supply Unit. Note: The signal names SDA/B and RDA/B do not always have the same polarity as that shown above. Check the polarity of the external device before making connections. Applicable Connectors Plug: FMC 1.5/5-STF-3.5AU (by Phoenix Contact) Recommended Cable CO-HC-ESV-3Px7/0.2 (by Hirakawa Hewtech) Cable length: 1,200 m max. (multidrop connections) 13 CJ1W-SCU Dimensions (Unit: mm) CJ1W-SCU22 CJ1W-SCU21-V1/SCU31-V1/SCU41-V1 31 SCU21-V1 65 RUN ERC SD1 RD1 ERH SD2 RD2 2 34 5 6 78 9 01 RDY UNIT NO. AB C 90 PORT1 PORT2 Note: The appearance varies with the model. CJ1W-SCU32 81.9 31 SCU32 65 RUN ERC SD1 RD1 TER1 ERH SD2 RD2 TER2 ON WIRE 2 4 3456 789A TERM OFF 01 EF 2 RDY BCD RDARDA+ UNIT NO. PORT1 (RS422 /485) SDA- 90 SDA+ FG PORT2 (RS422 RDA- /485) RDA+ SDASDA+ TERM OFF FG ON WIRE 2 4 CJ1W-SCU42 81.9 31 SCU42 65 RUN ERC SD1 RD1 TER1 ERH SD2 RD2 4 3456 01 EF 2 ON WIRE 2 RDA- 789A TERM OFF BCD RDY UNIT NO. PORT1 (RS422 /485) RDB+ 90 SDASDB+ FG PORT2 14 CJ1W-SCU Related Manuals Manual name CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit Serial Communications Boards and Serial Communications Units Operation Manual Cat. No. W494 Model numbers CJ1W-SCU@2 Application Learning about the functions to use Serial Communications Unit and Boards with NJ series configuration (hardware and serial communications mode). Learning about the standard system protocol with OMRON components W336 CX-Protocol Operation Manual W344 CX-Integrator CS/CJ/CP/NSJseries Network Configuration Tool Operation Manual W464 CS1W-SCB@1-V1 CS1W-SCU@1-V1 CJ1W-SCU@1-V1 CJ1W-SCU@2 --- Learning about the functions to use Serial Communications Unit and Boards (hardware and serial communications mode) . Learning about the standard system protocol with OMRON components Learning about the use of CX-Protocol, which enables protocol macro creation. Learning about the details of functions of protocol macros made by users. Learning how to configure networks (data links, routing tables, Communications Unit settings, etc.). Description Describes the use of Serial Communications Unit and Boards with NJ-series configuration (hardware and serial communications mode), including the usage of standard system protocols. Refer to the CX-Protocol Operation Manual (Cat. No. W344) for the details of functions of protocol macros made by users. Describes the use of Serial Communications Unit and Boards with CJ-series configuration (hardware and serial communications mode), including the usage of standard system protocols. Refer to the CX-Protocol Operation Manual (Cat. No. W344) for the details of functions of protocol macros made by users. Describes 1) the use of the CX-Protocol, and 2) details on protocol macros. Use this manual to create protocol macros for serial communications, or to customize the standard system protocol. Describes operating procedures for the CXIntegrator. 15 Terms and Conditions Agreement Read and understand this catalog. Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranties. (a) Exclusive Warranty. Omron's exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. (b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron's sole obligation hereunder shall be, at Omron's election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty, repair, indemnity or any other claims or expenses regarding the Products unless Omron's analysis confirms that the Products were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate modification. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice, recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above warranty. See http://www.omron.com/global/ or contact your Omron representative for published information. Limitation on Liability; Etc. OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY. Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted. Suitability of Use. Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the combination of the Product in the Buyer's application or use of the Product. At Buyer's request, Omron will provide applicable third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine, system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product with respect to Buyer's application, product or system. Buyer shall take application responsibility in all cases. NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM. Programmable Products. Omron Companies shall not be responsible for the user's programming of a programmable Product, or any consequence thereof. Performance Data. Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of Omron's test conditions, and the user must correlate it to actual application requirements. Actual performance is subject to the Omron's Warranty and Limitations of Liability. Change in Specifications. Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice to change part numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for your application. Please consult with your Omron's representative at any time to confirm actual specifications of purchased Product. Errors and Omissions. Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical or proofreading errors or omissions. 2014.7 In the interest of product improvement, specifications are subject to change without notice. OMRON Corporation Industrial Automation Company http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2014 All Right Reserved. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Omron: CJ1W-SCU41-V1 CJ1W-SCU31-V1 CJ1W-SCU42 CJ1W-SCU32 CJ1W-SCU22