Omron NT631 Setting the Front Switches, Connecting to a CPU Unit CVM1/CV-series -EV@ CPU Units

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

Setting the Front Switches

Communications port 1 (RS-232C)

Communications port 2 (RS-232C/RS-422A)

I/O port selector switch

RS-232C

RS-422A

• Unit # (SW3, SW4)

Set these switches to 0.

• I/O port selection (selector switch) Set this to RS-422A.

• Communications condition setting (DIP SW1) Set this switch to OFF.

Communications are executed in accordance with the CPU Bus Unit system settings made at the PLC. The initial values for the system settings are as follows.

-Communications speed: 9,600 bps

-Parity: Even

-Xon/Xoff control: Not executed

-Communications method: Full duplex

-Stop bits: 2 stop bits

-Data length: 7 bits

•Terminator setting (selector switch) Set this to ON.

Connecting to a CPU Unit 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, set the following communi- cations conditions for the PLC Setup.

Item	Setting at Host
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 memory switch at the NT631/NT631C. For details, refer to 6- 7-2 Setting the Host Link Method (page 155).

Either set the PLC Setup directly from a Programming Device (e.g. CX-Pro- grammer), or transmit the PLC Setup made at a Programming Device to the CPU Unit.

For details on the PLC Setup, refer to the SYSMAC CVM1/CV500/CV1000/

CV2000 Operation Manual: Ladder Diagrams (W202-E1-@).

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