Omron NT31 NT31C manual Connecting to CS1 Series Serial Communication Unit

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

When connecting PTs with model numbers 3 to 6 to port 1, for example, set the value 8200 Hex to DM32000, 0000 Hex to DM32001, and 0006 Hex to DM32006.

Connecting to CS1 Series Serial Communication Unit

A CS1 series backplane mounted type : CS1W-SCU21

Setting the Front Switches

Set the unit number of the serial communication unit by using the rotary switch located on the front panel. Set each switch with a flat blade screwdriver so that the values or symbols in the setting value window agree with the following.

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

Setting is written from the Programming Device (a Programming Console or CX- Programmer) directly into the allocation DM area (system setting area) of the CPU. After the setting is written, it becomes effective by turning the power ON, restarting the unit, restarting the communication port, or execution of the STUP command.

In the following, the channel numbers of the allocation DM area and settings are shown.

m=DM30000+100*unit number (CH)

Allocation DM area (CH)		Writing Value	Settings
Port 1	Port 2
m	m+10	8200	NT link (1:N) mode
m+1	m+11	0000 to 0009 (*1)	Communications baud rate
			(standard)
m+6	m+16	000j	j = The largest model number of
			the connected PT (0 - 7)

*1 Set any value between 0000 and 0009 Hex for the communications baud rate. The same baud rate will be used regardless of the value as long as it is between 0000 and 0009 Hex.

Using the High-speed NT Link (1:N) Method

Compatible Host Units

Only the -V1 versions of OMRON’s CS1H and CS1G PCs support the high- speed 1:N NT Link directly. Other CS1-series PCs can use the high-speed 1:N NT Link indirectly through a CS1W-SCU21 Serial Communications Unit. (If a Serial Communications Unit is used, even CS1-series Units without the “-V1” suffix can be connected via high-speed 1:N NT Link.)

Be sure to check the model number of the PC and Serial Communications

Board/Unit before trying to establish the high-speed 1:N NT Link.

The following table shows which CS1-series PCs can be connected to an

NT31/NT31C with the high-speed 1:N NT Link.

CPU Units with Built-in	CPUs Connectable only through a
NT Link Function	Serial Communication Board or Unit
CS1G-CPU42/43/44/45-EV1 (*1)	CS1G-CPU42/43/44/45-E(V1) (*2)
CS1H-CPU63/64/65/66/67-EV1 (*1)	CS1H-CPU63/64/65/66/67-E(V1) (*2)

*1 The high-speed 1:N NT Link is not supported in a direct connection to the CPU Unit of a CS1-series PC without the -V1 suffix.

*2 A CS1W-SCB21 or CS1W-SCB41 Serial Communication Board or CS1W-SCU21 Serial Communications Unit is required.

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