Connecting to the RS-232C Port at the Host

Section 4-1

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)

When using communications port 2, set these switches to 0.

I/O port selection (selector switch) Set this to RS-232C.

CTS selection (DIP SW2 and SW3)

Set SW2 or SW3 to ON. (Set this always to 0 V.)

To use communications port 1, set SW2. To use communications port 2, set SW3.

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: 9600 bps

-Parity: Even

-Xon/Xoff control: Not executed

-Communications method: Full duplex

-Stop bits: 2 stop bits

-Data length: 7 bits

Connecting to a CPU Unit

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

Either set PLC Setup directly from a Programming Device (e.g. CX-Program- mer), 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/CV500/1000/2000

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

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Omron NT631C manual CV500-CPU01-EV1/CV1000-CPU01-EV1/CV2000-CPU01-EV1, PLC Setup