Table of Contents
Advertisement
2.4 Wiring for Communication Cassettes COM1 to COM4 Ports
Switch No. Function
1
2
RS-485 / RS-422 switching
3
4
Terminal resistance
■
Setting of cassette backside switch
The relationship between the settings of switches on the back of the cassette and the
communication interface part is shown in the figure below.
■
Terminal layout
Allocated function
Terminal
(When RS-485 is
code
selected)
S+
Transmission line (+)
S-
Transmission line (-)
R+
Transmission line (+)
WUME-FPXHCOMG-02
Setting method
Move all the three switch pins to the same side.
When set to the ON side: RS-485, When set to the OFF side:
RS-422
When using RS-485: Turn ON this switch pin only when it is the
terminal unit.
When using RS-422: Turn ON this switch.
Allocated function
(When RS-422 is
selected)
Send data (+)
Send data (-)
Receive data (+)
Port allocated on the
software
Cassette
Signal direction
mounting
part 1
PLC → External
device
PLC → External
COM1
device
PLC ← External
device
Cassette
mounting
part 2
COM3
2-11
Advertisement
Table of Contents
