Omron Programmable Terminals NT31 NT31C - Manual (Page 82)

4-1 Section Connecting to the RS-232C Port at the Host
71
Connecting to CVM1/CV Series (-EV
j)
Set the DIP switches on the front panel as follows.
OFF ON
1
2
3
4
5
6
ON
I/O port selection (selector switch)
Set this to RS-232C.
Set SW3 to use NT link
(ON, right side).
DIP switch setting (SW3)
When using the CVM1/CV series, CPU execution processing (execution control
2) in the PC Setup must be set to Simultaneous processing.