Omron NT620S Operation Manual page 59

Connection to a PC by the NT Link (1:1)
I/O port
selector
switch
RS-232C
RS-422
Correct use When using CVM1/CV series, always set "CPU execution processing (execu-
46
S CVM1/CV-series (-EVj)
When connecting to a CVM1/CV-series (-EVj) CPU, set the switches as given
below.
I/O port selection (selector switch)
Set this to "RS-232C".
NT link (1:1) cannot be used with RS-422A.
DIP switch setting (SW3)
D
D
D
D
D
D
OFF ↔ ON
tion control 2)" in the PC system settings to "simultaneous processing".
NT link setting
Set SW3 to ON position (right side)
to set "use NT link".
Section 2-6