Mitsubishi Electric MELSEC FX Series User Manual page 109

FX communication
2 ) Use terminal mode of control line
This mode is available for send only or receive only.
a ) Send only
RS instruction
driving
Send data
SD (TXD)
Send request
M8122
ER(DTR)
DR(DSR)
b ) Receive only
RS instruction
driving
Receive data
RD (RXD)
ER(DTR)
Receive
completion
M8123
OFF ON
Data 1
OFF ON
OFF
ON
OFF ON
OFF ON
OFF ON
OFF ON
Reset using a program. When it is not trurned off, the next data cannot
be received.
Data 1
Data 1
ON
RS instruction 9
Data 2
Data 2
ON
9-7
9