Omron NT631C manual When Using the NT Link 11 Method Compatible Host Units

Connecting to the RS-232C Port at the Host Section 4-1

SCU21

RUN	RDY
ERC	ERH
SD1	SD2
RD1	RD2

UNIT		F
No.	10
	32
	4
	56789

Set the unit number to 0 through F so that it will not overlap with the numbers used in other units.

Allocation DM Area Settings for CPU Unit

Settings are written from the Programming Device (a Programming Console or CX-Programmer) directly into the allocation DM area (system setting area) of the CPU Unit. After the settings are written, they become effective by turn- ing the power ON, restarting the Unit, restarting the communications port, or execution of the STUP command.

In the following, the channel numbers of the allocation DM area and the set- tings are shown.

m=DM30000+100⋅unit # (CH)

Allocation DM area (CH)		Writing Value	Settings
Port 1	Port 2
m	m+10	8000	Host link mode, 2 stop bits, even parity, data
			length 7 bits
m+1	m+11	0000	Communications speed 9600 bps.
		0007	Communications speed 19200 bps.
m+2	m+12	0000	Transmit delay time 0 ms.
m+3	m+13	0000	No CTS control Unit No.0 for host link

When Using the NT Link (1:1) Method

Compatible Host Units

Some models and series of OMRON PLCs have the NT link (1:1) function built in. With CQM1H PLCs, a Serial Communications Board can be added to provide 1:1 NT Link communications. Some C200HX/HG/HE(-Z)E CPU Units can be connected by the NT link (1:1) method by installing a Communications Board.

Check the model and series of the PLC against the type of CPU Unit before making the connections.

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