Omron NT31 Operation Manuals page 139

Connecting to the Host's RS-422A/485 Port
128
S Settings at the host
The setting methods for each type of unit are described in the following.
- Connecting to a CVM1/CV-series (-EVj) CPUs
@ CV500-CPU01-EV1/CV1000-CPU01-EV1/CV2000-CPU01-EV1
@ CVM1-CPU01-EV2/CVM1-CPU11-EV2/CVM1-CPU21-EV2
[PC system settings]
When connecting to the CVM1/CV series CPU by the NT link (1:1) method, no
particular settings are required at the PC system settings.
[Setting the front switches]
I/O port selector switch
RS-232C
RS-422A
@ Host link communication method selection
(selector switch)
Set this to "RS-422A".
@ Communication type setting (DIP SW3)
Set this switch to "ON".
(for communication by "NT link")
@ Terminator setting (DIP SW6)
Set this switch to "ON".
(Set terminator "ON".)
Section 5-2