Omron NT631 Connecting to a C-series C200HX/HG/HE-ZE, Host Model Word # Setting Setting Contents

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

*3 CPU Units of CVM1/CV-series PLCs without the suffix -EV@cannot be connected.

The NT Link (1:1) method cannot be used using RS-485. To use the NT Link (1:1) method, connect by RS-422A.

The 1:1 NT Link connection using RS-422A/485 is not possible with the

CPM1, CPM2A, or CPM2C.

Settings at the Host

The setting methods for each type of Unit are described in the following.

•Connecting to a CVM1/CV-series (-EV@) CPU Units

•CV500-CPU01-EV1/CV1000-CPU01-EV1/CV2000-CPU01-EV1

•CVM1-CPU01-EV2/CVM1-CPU11-EV2/CVM1-CPU21-EV2

PLC Setup

When connecting to a CVM1/CV-series CPU Unit by the NT Link (1:1) method, no particular settings are required at the PLC Setup.

Setting the Front Switches

I/O port selector switch

RS-232C

RS-422A

•Host link communications method selection (selector switch)

Set this to RS-422A.

•Communications type setting (DIP SW3)

Set this switch to ON.

(for communications by NT Link)

• Terminator setting (DIP SW6)

Set this switch to ON. (Set terminator ON.)

• Connecting to a C-series C200HX/HG/HE(-Z)E

PLC Setup Area Settings

Write the PLC Setup area (data memory) settings directly from a Program- ming Device (e.g. CX-Programmer) in accordance with the host model.

Host Model	Word #	Setting	Setting Contents
Port A of C200HX/HG/HE(-Z)E*1	DM6555	4000	Use NT Link (1:1)
Port 2 of CQM1H*2	DM6550	4000

*1 RS-422A port of the Communications Board

*2 RS-422A port of the Serial Communications Board

For details on operations relating to the PLC Setup area, refer to the manual for the PLC you are using.

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