Omron NT631C Allocated DM Area Setting Setting Contents, Port DM32010 8200 1N NT Link Mode

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

*2 This CPU Unit is for a Duplex-CPU Unit System. The CS1W-SCB41(-V1) Serial Communications Board cannot be used. Use the CS1W-SCU31-V1 Communications Unit.

*3 A CS1W-SCU31-V1 or CS1W-SCU41(-V1) Serial Communications Unit is required.

Settings at the Host

Connecting to a CS-series Serial Communications Board

Serial Communications Board equipped with an RS-422A/485 port for CS- series CPU Units:

CS1W-SCB41(-V1) (Port 2 is an RS-422A/485 port.)

Reference: CS-series Serial Communications Boards and Units with lot number 991220 (12/20/99) and later support the high-speed 1:N NT Link. Boards and Units with earlier lot numbers cannot be used.

Setting the Front Switches

Set the switches on a Serial Communications Board as follows.

2-wire or 4-wire selector (WIRE):

4

2

(4-wire = RS-422A), or

(2-wire = RS-485)

Terminating resistance switch (TERM): ON (terminator ON = terminating resistance enabled).

Port 1

RS-232C

Port 2 RS-422A/485

RDY

COMM1

COMM2

PORT1

OFF ON TERM

24 WIRE

PORT2

(RS422/

RS485)

Terminator Switch (TERM)

Set to ON (right side).

Wire Selection Switch (WIRE)

RS-422A: Set to 4 (right side) for 4-wire type.

RS-485: Set to 2 (left side) for 2-wire type.

SCB41

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 settings are written, they become effective by turning the power ON, restarting the Unit, restarting the communications port, or exe- cuting the STUP command.

In the following table, the relevant word addresses in the allocation DM area and settings are shown.

Allocated DM Area	Setting	Setting Contents
words
Port 2
DM32010	8200	1:N NT Link Mode

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