Omron NT631C manual When using a CPM1, CPM2A, CPM2C, SRM1, When using a CQM1H

Connecting to the Host’s RS-422A/485 Port Section 5-2

PLC Setup Area Settings

When connecting to a C200HX/HG/HE(-Z)E or CPM1, CPM2A, CPM2C, CQM1H CPU Units or SRM1, set the following communications conditions for the PLC Setup area.

Item	Setting at Host
I/O port	RS-422A
Communications mode	Host link mode
Communications speed	Set the same speed as for the NT631/NT631C. (*1)
Stop bit	2 stop bits
Parity	Even
Data length	ASCII 7 bits
Unit #	00

*1 Set the host link communications speed at 9600 bps or 19200 bps with the Comm. Speed at the NT631/NT631C. For details, refer to 6-7-2 Setting the Host Link Method (page 155).

Set the PLC Setup area settings directly from a Programming Device (e.g.

CX-Programmer).

For details on operations relating to the PLC Setup area, refer to the manual for the PLC which is used.

The PLC Setup area word numbers and settings to be made depending on the Unit to which the connection is made are shown below.

When using port A of the Communications Board of C200HX/HG/HE(-Z)E

Word #	Setting	Setting Contents
DM6555	0001	Host link mode, no CTS control
		Communications conditions set by the contents of DM
DM6556	0303	Data length 7 bits, 2 stop bits, even parity, communica-
		tions speed: 9600 bps
	0304	Data length 7 bits, 2 stop bits, even parity, communica-
		tions speed: 19200 bps
DM6558	0000	Unit # 00

When using a CPM1, CPM2A, CPM2C, SRM1

Word #	Setting	Setting Contents
DM6650	0001	Host link mode, no CTS control
		Communications conditions set by the contents of DM
DM6651	0303	Data length 7 bits, 2 stop bits, even parity, communica-
		tions speed: 9600 bps
	0304	Data length 7 bits, 2 stop bits, even parity, communica-
		tions speed: 19200 bps
DM6653	0000	Unit # 00

When using a CQM1H

Word #	Setting	Setting Contents
DM6550	0001	Host link mode, no CTS control
		Communications conditions set by the contents of DM
DM6551	0303	Data length 7 bits, 2 stop bits, even parity, communica-
		tions speed: 9600 bps
	0304	Data length 7 bits, 2 stop bits, even parity, communica-
		tions speed: 19200 bps
DM6553	0000	Unit # 00

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