Omron Programmable Terminals NT631 Setup Manual page 71

Connecting to the RS-232C Port at the Host
Connecting to a CPU Unit
54
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
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
Communications speed
Stop bit
Parity
Data length
Unit #
*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-@).
• 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
Setting at Host
Set the same speed as set at the NT631/NT631C
2 stop bits
Even
ASCII 7 bits
00
Section 4-1
(*1)