Omron SYSMAC CJ1W-SCU21-V1 User Manual (English)

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Basic Operating Procedure Section 1-9

received data and return responses. An example is provided below for

SEND(090).

SEND(090) can be used to send data from the PLC to a host computer. If the

input condition turns ON when the Communications Port Enabled Flag is ON,

10 words of data from CIO 0100 to CIO 0109 will be sent to the host computer

connected to port 1 on the Serial Communications Unit with network address

0, node address 0, and unit address 10 Hex.

The control data for the above instruction is shown in the following table.

A program would be required at the host computer to receive the above data

and return a response.

Protocol Macros

When a standard system protocol (provided in the Serial Communications

Board, Serial Communications Unit, and CX-Protocol) is executed.

Using Standard System Protocols

1,2,3... 1. Setting the Send Data

Programming to

return responses.

Host computer

Command

Serial Communications

Board/Unit

CPU Unit

SEND(090),

RECV(098),

CMND(490)

Communications Port

Enabled Flag for Port 0

First send word: CIO 0100

"0000" used to send to a host computer.

First control data word: D00200

@SEND (90)

0100

0000

D00200

Input condition A20200

Word Contents Meaning

D00200 000A Number of send words: 10

D00201 0100 Bits 00 to 07: Destination network address 0

Bits 08 to 10: Serial Communications Unit port 1

D00202 0010 Bits 00 to 07: Destination unit address 10 Hex

Bits 08 to 15: Destination node address 0

D00203 0000 Bits 00 to 04: Number of retries is 0

Bits 08 to 11: Communications port 0

Bit 15: Response required

D00204 0000 Response monitoring time: 2 s (default value for 0000)

Board or Unit

Uses standard system protocol No. 600

Executed

with

PMCR(260)

(237)

CPU Unit

External device

Example: K3N Series

Digital Panel Meter

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Omron SYSMAC CJ1W-SCU21-V1 Specifications

General

Model	CJ1W-SCU21-V1
Type	Serial Communications Unit
Number of Ports	1
Parity Check	None, Even, Odd
Manufacturer	Omron
Operating Temperature	0 to 55 °C
Storage Temperature	-25 to 65 °C
Data Bits	7, 8
Stop Bits	1 or 2 bits
Flow Control	RTS/CTS
Isolation	Photocoupler isolation
Applicable PLC	CJ1 Series
Power Supply	5 VDC (supplied from the PLC backplane)
Compatible PLC Series	CJ1 Series
Protocol Support	NT Link, Host Link, No-protocol Mode
Baud Rate	300 to 115200 bps