4.2.21 Connecting to RS-422A
converter
Setting DIP switches
Set the DIP switches.
Switch
No.
1
2
O
1
N
2
3
4
3
5
6
5
6
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4. CONNECTION TO OMRON PLC
4.2 Serial Connection
DIP switch
Settings
Description
Terminating
ON
Enable
resistance
selection
4-wire
2-wire or 4-
OFF
type
wire selection
4-wire
2-wire or 4-
OFF
type
wire selection
RS
RS control
ON
control
selection for
enabled
RD
RS
RS control
ON
control
selection for
enabled
SD