CJ1W-SCU41-V1 [OMRON]

CJ-series Serial Communications Units;


型号：	CJ1W-SCU41-V1
厂家：	OMRON ELECTRONICS LLC
描述：	CJ-series Serial Communications Units
文件：	总16页 (文件大小：1253K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CJ-series Serial Communications Units

CJ1W-SCU

CSM_CJ1W-SCU_DS_E_9_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

CJ1W-SCU22

CJ1W-SCU32

CJ1W-SCU42

Gateway, and No-protocol.

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)

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)

Smart Sensor

Temperature Controller

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.

Current

consumption (A)

Specifications

Communications functions

No. of unit

numbers

allocated

Unit type

CJ1 CPU

Bus Units Communications

Units

Product name

Model

Standards

Communications

Interface

24V

Serial

The following functions can be

selected for each port with an CJ-

system:

• Protocol macro

• Host Link

• NT Links (1:N mode)

High-speed type

0.28

2 RS-232C ports

—

CJ1W-SCU22 *2

• Serial Gateway

• No-protocol *3

• Modbus-RTU Slave

UC1, N,

L, CE

The following functions can be

selected for each port with an NJ-

system:

• Protocol macro

• Serial Gateway

2 RS-422A/485 ports

0.40

—

CJ1W-SCU32 *2

CJ1W-SCU42 *2

• No-protocol

• Modbus-RTU Slave

1 RS-232C port and

1 RS-422A/485 port

0.36

CJ1 CPU

Bus Units Communications

Units

Serial

The following functions can be

selected for each port:

• Protocol macro *4

• Host Link

0.28

2 RS-232C ports

—

CJ1W-SCU21-V1 *8

CJ1W-SCU31-V1 *8

CJ1W-SCU41-V1 *8

• NT Links (1:N mode)

• Serial Gateway *5

• No-protocol *6

UC1, N,

L, CE

2 RS-422A/485 ports

0.38

• Modbus-RTU Slave *7

1 RS-232C port and

1 RS-422A/485 port

0.38

*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 CS1/CJ1 CPU Unit of unit version

3.0 or later or a CJ2 CPU Unit 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-SCU32

CJ1W-SCU42

2 Serial Port (RS-422A/485) Connector

Terminal Block Connector (FMC1.5/5-STF-3.5AU by Phoenix Contact)

1 Serial Port (RS-422A/485) Connector

Terminal Block Connector (FMC1.5/5-STF-3.5AU by Phoenix Contact)

Note: A serial port connector is not provided. Purchase a connector separately for serial port connection.

Plug : XM3A-0921 (manufactured by OMRON) or equivalent

Hood : XM2S-0911-E (manufactured by OMRON) or equivalent

Mountable Racks

NJ system

CJ system (CJ1, CJ2)

CP1H system

CP1H PLC

NSJ system

Model

Expansion

CPU Rack

NSJ

Controller

Expansion

Backplane

CPU Rack *4

Rack *4

Backplane

CJ1W-SCU22

Unit version 2.0

Unit version 1.3

10 Units

(per Expansion

Backplane)

CJ1W-SCU32

10 Units

10 Units *2

(per Expansion

10 Units *2

Not supported (per Expansion

CJ1W-SCU42

10 Units *1

2 Units *3

CJ1W-SCU21-V1

CJ1W-SCU31-V1

CJ1W-SCU41-V1

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.

CJ1W-SCU

Specifications

Item

Device name

Description

Serial Communications Unit

CPU Bus Unit

Classification

Model number

CJ1W-SCU22

RS-232C

CJ1W-SCU32

CJ1W-SCU42

RS-422A/485

RS-232C

CJ1W-SCU21-V1

CJ1W-SCU31-V1

RS-422A/485

CJ1W-SCU41-V1

RS-422A/485

RS-232C

Port 1

Serial ports

RS-422A/485

RS-232C

Port 2

RS-232C

RS-422A/485

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.

Port 1

lected for each port. *1 *2

• Unit Ver. 1.2 or later also supports Serial Gateway, no-proto-

col, and 1:1 Host Link modes. (Note: The Serial Gateway can

also be executed in protocol macro mode.) *1

Protocol

Port 2

• Unit Ver. 1.3 or later also supports Modbus-RTU slave mode.

CPU Unit

None

A total of up to 16 Units, including all other CPU Bus Units. No

restrictions on the mounting location.

CPU Rack

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

Number of

mountable

Units

A total of up to 16 Units, including all other CPU Bus Units. No

restrictions on the mounting location.

Expansion

Rack

• CJ2H-CPU6

Slots 0 to 4

@, CJ2M-CPU@@ or CJ1G/H-CPU@@H CPU Unit:

• CJ1M-CPU@@ CPU Unit: Slots 0 to 2

External interrupt tasks will not be started if the Unit is mounted to

any other slot.

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

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

set by the • Ladder instruction: STUP(237)

system • 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.

Simple Backup Function

(The Simple Backup Function can be used with the CJ1-H and CJ1M CPU Units only.)

Current consumption *3

Weight

280mA+x

160g Max.

400mA

360mA+x

280mA+x

110g Max.

380mA

380mA+x

110g Max.

120g Max.

140g 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.

CJ1W-SCU

Protocol Specifications

Host Link Specifications

Item

Description

Communications mode

Synchronous mode

Half-duplex (Full-duplex for slave-initiated communications)

Start-stop synchronization (asynchronous mode)

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

Baud rate *1

RS-232C port

: 15 m max. *3

RS-422A/485 Port :

• CJ1W-SCU@1-V1

Communications distance

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.)

RS-232C port

RS-422A/485 port : 1:N (N = 32 Units max.)

: 1:1 (1:N (N = 32 Units max.) is possible using an Converting Link Adapters.)

Connection configuration

Number of connected Units 32 Units max. (unit numbers 0 to 31; unit number 0 is set for 1:1 connection)

Header: @, address: (host link unit number) 0 to 31 (BCD), data: header code + text, error check

code: FCS, terminator: * +CR

C-mode commands

FINS commands

Frame structure

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

Vertical parity: Even, odd. or none

FCS (horizontal parity converted to ASCII)

Error check codes

Command flow

Commands

Contents

C-mode commands 1:1 or 1:N communications with directly connected Controller *4

Host computer to Controller

FINS commands

Command flow and support

1:1 or 1:N communications with directly connected Controller.

(in Host Link protocol)

FINS commands

(in Host Link protocol) Unit. *5

Communications using SEND(090), RECV(098), and CMND(490) from CPU

Controller to host computer

*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

Description

Number of protocols

Number of sequences

20 max.

Can be created and registered with the Protocol Support Tool (CX-Protocol).

1,000 max.

Number of sequences

Number of messages

60 max.

300 max.

Per protocol

Number of reception

matrixes

100 max.

Sequence execution condition

Communications mode

Synchronous mode

Using the CPU Unit’s PMCR (260) instruction (specifying the sequence number)

Half-duplex or full-duplex

Start-stop synchronization (asynchronous mode)

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

Baud rate *1

RS-232C port

: 15 m max.

RS-422A/485 port :

• CJ1W-SCU@1-V1

Communications distance *1

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, max-

imum cable length is 500 m if the NT-AL001 is used for RS-422A-485 connections.)

RS-232C port

RS-422A/485 port : 1:N (N = 32 Units max.)

: 1:1 (1:N (N = 32 Units max.) is possible using a Converting Link Adapter.)

Connection configuration

Number of connected Units

32 Units max. (unit numbers 0 to 31; unit number 0 is set for 1:1 connection)

Including the word that specifies the number of

words (1 word)

Operand setting

250 words

Maximum number of data

exchange words between

Controller and protocol

macro function

Link word setting

Direct setting

500 words

O1, O2, I1, and I2: 500 words total

Maximum number of words per data attribute

CJ1W-SCU

Item

Number of steps per

Description

16 max.

sequence

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.

Scan method (fixed)

Support

Response notification

method (operand)

Sequence contents

(step common parameters)

Interrupt notification

Not support

Not suppprt

Interrupt notification for reception case number

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

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

Link word setting

Send only (SEND), receive only (RECV), send and receive (SEND&RECV), wait (WAIT), reception

buffer clear (FLUSH), ER-ON (OPEN), or ER-OFF (CLOSE)

Commands

Repeat counter

Retry count

1 to 255 times

0 to 9 (Only when the command is SEND&RECV)

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)

Send wait time

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.

With or without response

write (operand)

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.

Next processing

Step contents

Error processing

Send message

When a step has ended abnormally, End, Next, Goto, or Abort can be selected.

Data sent to the specified address when the

command is SEND or SEND&RECV.

Consists of a header, address, length, data,

error check code, and terminator.

Data sent from the specified address when the

command is RECV or SEND&RECV.

Receive message

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).

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.

Reception matrix

Header and

Con-

terminator data

stant

ASCII data, hexadecimal data, or control code

attributes

Con-

stant

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

method

X: Effective address (where read from, or where written to)

Y: Data size (1 to 1,000) *4

Specify using the

3rd operand of the

PMCR(260) instruction.

Word read

(I/O memory to send

data)

Specify using a link

word.

Message unit contents

Data attributes of

addresses anddata

in send/receive

messages

Set leading address + n

(The linear expression

aN + b, including

I/O memory direct

designation

Vari-

able

Word

designation

Specify using the

repeat counter N, is

also possible for n.)

4th operand of the

PMCR(260) instruction.

Word write

(receive data to I/O

memory)

Specify using a link

word.

I/O memory direct

designation

Any data or address can be received

(only in receive messages)

Wild card

Repeat

counter

CJ1W-SCU

Item

Description

Linear expres-

sion including aN+b

repeat counter

a: 0 to 1000; b: 1 to 1000

N: Repeat counter value

Can be received regardless of the length

(only in receive messages)

Wild card

Data attributes of

addresses anddata Vari-

Specify using the

3rd operand of the

PMCR(260) instruction.

in send/receive

messages

able

Setleadingaddress + n

(The linear expression

Word read

(I/O memory to send

data)

Word designa-

tion

Specify using a link

word.

aN + b, including

repeat counter N, is

also possible for n.)

I/O memory direct

designation

Message unit contents

Error check codes

Maximum length of

LRC, LRC2, CRC-CCITT, CRC-16, SUM, SUM1, and SUM2 can be calculated.

1,000 bytes. (A maximum length between 200 and 1,000 bytes can be set in the Setup Area.)

send/receive messages

Maximum number of data

attributes registered in one 96 attributes *5

message

Maximum number of write

data attributes registered in 30 attributes *6

one message

• 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)

• 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.

Conversion functions

Converted format

• 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.

• CompoWay/F commands

• Modbus-RTU commands

• Modbus-ASCII commands

• Host Link FINS commands

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.

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

Protocol macro execution

processing

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

Response 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 start timeout

monitoring

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)

Send delay

Default: 0 s (setting range: 0.01 to 300.00 s)

*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.

CJ1W-SCU

No-protocol Specifications

Item

Description

Communications mode

Full-duplex

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

Baud rate *1

RS-232C port

: 15 m max.

RS-422A/485 port :

• CJ1W-SCU@1-V1

Communications distance

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.)

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

Messages

(communications frame

structure)

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

End code

None or 00 to FF hex

None, 00 to FF hex, or CR + LF

Number of receive data bytes Set the number of receive data bytes between 1 and 256 bytes (according to the DM Area settings)

during reception

when frame structure 1 or 2 above is used.

CJ: TXDU(256) instruction *3

NJ: SerialSend instruction

CJ: RXDU(255) instruction *3

Sending messages

Receiving messages

NJ: SerialRcv or SerialRcvNoClear instruction *4

Maximum message length

Data conversion

Sending and receiving: Up to 259 bytes including the start code and end code (up to 256 bytes excluding start/end codes)

No conversion

None

Communications protocol

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)

Message delay time

Receive counter

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.)

The number of data bytes (0 to 256) received at the port can be counted.

• 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

Reception buffer clear

timing

• 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

1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps *2

Default: 19,200 bps

Baud rate

Data length

Parity

8 bits

Odd, even, or none

Default: Even

Odd or even parity :1 bit

Stop bits

No parity

: 2 bits

Address setting range

1 to 247 (broadcasting: 0)

Slave address: 1 byte

Function code : 1 byte

Frame format

Data

: 0 to 252 bytes

: 2 bytes

CRC code

*1. Modbus-ASCII mode is not supported.

*2. The CJ1W-SCU@2 is required for communications at 230,400 bps.

CJ1W-SCU

Supported Commands

Function code

(hexadecimal)

Function

Modbus name

Reads multiple bits from the CIO, Work, Holding, or Auxiliary Area of I/O memory.

Reads multiple bits from the CIO Area of I/O memory.

Reads multiple words from the DM or EM Area of I/O memory.

Reads multiple words from the CIO, Work, Holding, or Auxiliary Area of I/O memory.

Writes a bit in I/O memory.

Read Coils

Read Discrete Inputs

Read Holding Registers

Read Input Registers

Write Single Coil

Writes a word in the DM or EM Area of I/O memory.

Executes an echoback test.

Write Single Register

Diagnostic

Writes multiple bits in I/O memory.

Write Multiple Coils

Write Multiple Registers

Writes multiple words in the DM or EM Area of I/O memory.

Unit Version and Manufacturing Dates/Lot Numbers

CJ1W-SCU@1-V1

Classification

Type

Model

CJ1W-SCU21-V1

May 2004

Per-Ver 1.2

June 2004

November 2005

Unit version 1.2

(Lot No:040617 and later)

Unit version 1.3

Serial Communications

Units

CPU Bus Units

CJ1W-SCU41-V1

CJ1W-SCU31-V1

—

Unit version 1.3 *

Ver.6.1

CX-Programmer

CX-Protocol

—

Ver.4.0 or earlier

Ver.1.4 or earlier

Ver.5.0

Ver.1.5

Support

Software

Ver.1.7

* Available April, 2006

CJ1W-SCU@2

Classification

Type

Model

September 2009

September 2012

CJ1W-SCU22

CJ1W-SCU32

CJ1W-SCU42

—

Serial Communications

Units

CPU Bus Units

Unit version 2.0

Unit version 2.1 *1

CX-Programmer

CX-Protocol

Ver.8.3 or higher

Ver.1.9 or higher

Ver.1.04 or higher

Support

Software

—

Sysmac Studio

形SYSMAC-SE□

Machine

Automation

Controller

Ver.1.00 or earlier *

Ver.1.01 or earlier *

形NJ5-□□□□

形NJ3-□□□□

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.

CJ1W-SCU

Function Support by Unit Version

Function Support by Unit Version 2.1

Unit version

Unit version 2.1

CJ1W-SCU22

Serial Communications Units model CJ1W-SCU32

CJ Series

CJ1W-SCU42

No-

protocol

NJ: SerialRcvNoClear instruction

Supported

Function Support by Unit Version 2.0

Product

Unit version 2.0

CJ1W-SCU22

CJ1W-SCU32

CJ1W-SCU42

Supported

CJ Series

Serial Communications Units

Serial gateway

1:1 links

Supported

Host Link

Host Link compatible device

selection

Supported

No-protocol

Link word specification data

exchange timing

On-request I/O refreshing

Continuous I/O refreshing

Protocol

macro

Reception buffer processing for

PMCR(260) instruction execution

Select to clear or hold contents.

Baud rate (bps)

230,400 supported.

Supported

Standard system protocol additions

MODBUS slave protocol added

Supported

Function Support by Unit Version 1.2 and Unit Version 1.3

Earlier version

(pre-ver. 1.2)

Product

Unit version 1.2

Unit version 1.3

CJ1W-SCU21

CJ1W-SCU21-V1

CJ Series

Serial Communications Units

—

CJ1W-SCU31-V1

CJ1W-SCU41-V1

Supported

CJ1W-SCU41

Not supported

CJ1W-SCU41-V1

Supported

Serial gateway

1:1 links

Supported

Host Link

Host Link compatible device

selection

Not supported

Supported

No-protocol

Not supported

Link word specification data

exchange timing

On-request I/O refreshing

Continuous I/O refreshing

On-request I/O refreshing

Continuous I/O refreshing

On-request I/O refreshing only

Reception buffer processing for

PMCR(260) instruction execution

Protocol

macro

Clearing only

Select to clear or hold contents. Select to clear or hold contents.

38,400 max.

Baud rate (bps)

(57,600 and 115,200 not

supported)

57,600 supported.

Standard system protocol additions

MODBUS slave protocol added

Not supported

—

Supported

—

Supported

Note: Make sure that a CS1/CJ1 CPU Unit of unit version 3.0 or later or a CJ2 CPU Unit is used when using no-protocol mode.

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

CJ1W-SCU42

CJ1W-SCU21-V1/SCU22

SCU21-V1

SCU41-V1

SCU42

RUN ERC SD1 RD1

RUN ERC SD1 RD1 TER1

Indicators

RDY ERH SD2 RD2

Terminating

resistance switch

Terminating

resistance switch

TERM

OFF

TERM

OFF

UNIT

NO.

UNIT

NO.

UNIT

NO.

WIRE

Unit number

switch

Unit number

switch

Unit number

switch

PORT1

(RS422

/485)

PORT1

(RS422

/485)

2-wire/4-wire

switch

2-wire/4-wire

switch

RDA-

RDA+

SDA-

SDA+

Port 1:

RS-232C

Port 1:

RS-422A/485

Port1:

RS-422A/485

terminal-block

Connector

PORT2

Port 2:

RS-232C

CJ1W-SCU31-V1

CJ1W-SCU32

SCU31-V1

SCU32

RUN ERC SD1 RD1 TER1

Indicators

RDY ERH SD2 RD2 TER2

Terminating

resistance switch

(for port 1)

Terminating

resistance switch

(for port 1)

TERM

OFF

TERM

OFF

UNIT

NO.

UNIT

NO.

Magnified view of bottom-right

corner<CJ1W-SCU3ꢀ (-V1) only>

WIRE

Unit number

switch

Unit number

switch

PORT1

(RS422

/485)

RDA-

2-wire/4-wire

switch (for port 1)

2-wire/4-wire

switch (for port 1)

RDA+

SDA-

SDA+

Port 1:

Port1:

RS-422A/485

terminal-block

Connector

Terminating

resistance switch

(for port 2)

2-wire/4-wire switch

(for port 2)

PORT2

(RS422

/485)

PORT2

(RS422

/485)

RDA-

RDA+

Port 2:

RS-422A/485

Port2:

SDA-

RS-422A/485

terminal-block

Connector

SDA+

TERM

OFF

TERM

OFF

WIRE

CJ1W-SCU

Specifications of the RS-232C port and RS-422A/485 port

RS-232C Port

Protocol

Host Link

Protocol macro

Full-duplex or half-duplex

1:N NT Links

Communications

method

Full-duplex

Half-duplex

Synchronization

Baud rate

Start-stop synchronization (asynchronous)

1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps *1

1:1 (1:N is possible using Link Adapters)

Standard NT link or high-speed NT link *2

Connections

Transmission distance 15 m max. *3

Interface Complies with EIA RS-232C

Protocol

No-protocol

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

1:1 (1:N is possible using Link Adapters)

Connections

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

Signal name

I/O

—

1 *1

Shield

Send data

Output

Input

Output

Input

—

Receive data

Request to send

Clear to send

Power supply

Data set ready *4

Data terminal ready

Signal ground

Shield

4 *2

5 *2

6 *3

7 *2

8 *2

RTS (RS)

CTS (CS)

DSR (DR)

DTR (ER)

Input

Output

—

Shell *1

—

*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

Recommended Cables

UL2426 AWG28 × 5P IFS-RVV-SB (UL-approved, Fujikura Ltd.)

AWG28 × 5P IFVV-SB (not UL-approved, Fujikura Ltd.)

UL2426-SB (MA) 5P × 28AWG (7/0.127) (UL-approved, Hitachi Metals, Ltd.)

CO-MA-VV-SB 5P × 28AWG (7/0.127) (not UL-approved, Hitachi Metals, Ltd.)

Cable length: 15 m max.

CJ1W-SCU

RS-422A/485 Port

Protocol

Host Link

Protocol macro

Full-duplex or half-duplex

1:N NT Links

Communications

method

Full-duplex

Half-duplex

Synchronization

Baud rate

Start-stop synchronous (asynchronous)

1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200/230,400 bps *1

1:N (N: 32 Units max.)

Standard NT link or high-speed NT link *2

1:N (N: 8 Units max.)

Connections

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

No-protocol

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

1:N (N: 32 Units max.)

Connections

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

SDA

SDB

Signal name

I/O

Output

—

1 *1

Send data -

Send data +

Not used

2 *1

Not used

—

Not used

—

6 *1

RDA

Receive data -

Not used

Input

—

8 *1

RDB

Receive data +

Not used

Input

—

Shell *2

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

Recommended Cables

CO-HC-ESV-3P × 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.)

CJ1W-SCU

Connector Pin Layout (CJ1W-SCU32/SCU42)

Pin No.

Abbreviation

RDA

Signal name

I/O

Input

Output

—

1 *1

2 *1

3 *1

4 *1

5 *2

Receive data-

Receive data+

Send data-

Send data+

Shield

RDB

SDA

SDB

*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-3P×7/0.2 (by Hirakawa Hewtech)

Cable length: 1,200 m max. (multidrop connections)

CJ1W-SCU

Dimensions

(Unit: mm)

CJ1W-SCU22

CJ1W-SCU21-V1/SCU31-V1/SCU41-V1

SCU21-V1

RUN ERC SD1 RD1

RDY ERH SD2 RD2

UNIT

NO.

PORT1

PORT2

Note: The appearance varies with the model.

CJ1W-SCU32

81.9

SCU32

RUN ERC SD1 RD1 TER1

RDY ERH SD2 RD2 TER2

TERM

OFF

UNIT

NO.

WIRE

PORT1

(RS422

/485)

RDA-

RDA+

SDA-

SDA+

PORT2

(RS422

/485)

RDA-

RDA+

SDA-

SDA+ _TERM

OFF

WIRE

CJ1W-SCU42

81.9

SCU42

RUN ERC SD1 RD1 TER1

RDY ERH SD2 RD2

TERM

OFF

UNIT

NO.

WIRE

PORT1

(RS422

/485)

RDA-

RDB+

SDA-

SDB+

PORT2

CJ1W-SCU

Related Manuals

Manual name

Cat. No.

Model numbers

Application

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.

Learning about the functions to use Serial

Communications Unit and Boards with NJ

series configuration (hardware and serial

communications mode).

CJ-series Serial

CommunicationsUnitsOperation W494

Manual for NJ-series CPU Unit

CJ1W-SCU@2

Learning about the standard system protocol

with OMRON components

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.

Learning about the functions to use Serial

Communications Unit and Boards (hardware

and serial communications mode) .

CS1W-SCB@1-V1

CS1W-SCU@1-V1

CJ1W-SCU@1-V1

CJ1W-SCU@2

Serial Communications Boards

and Serial Communications

Units Operation Manual

W336

Learning about the standard system protocol

with OMRON components

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.

Learning about the use of CX-Protocol, which

enables protocol macro creation.

CX-Protocol Operation Manual

W344

W464

---

Learning about the details of functions of

protocol macros made by users.

CX-Integrator CS/CJ/CP/NSJ-

series Network Configuration

Tool Operation Manual

Learning how to configure networks (data

links, routing tables, Communications Unit

settings, etc.).

Describes operating procedures for the CX-

Integrator.

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.

2018.10

In the interest of product improvement, specifications are subject to change without notice.

OMRON Corporation

Industrial Automation Company

http://www.ia.omron.com/

CJ1W-SCU41-V1 [OMRON]

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