Mitsubishi Electric MELSEC FX Series User Manual page 110

FX communication
3 ) Use normal mode 1 of control line
RS instruction
driving
Send data SD
(TXD)
Send request
M8122
Send wait
flag M8121
ER(DTR)
Receive data
RD (RXD)
Receive
completion
M8123
DR(DSR)
Note:
* When using FX
more.
OFF ON
Data 1
OFF ON
OFF ON
OFF
OFF
This period should be 100 µs or more
, FX , FX , FX, or FX
1S 1N 0N
Data 3
OFF ON
Data 2
ON
ON
, this period should be longer than 2 scan times or
2C
RS instruction 9
Reset using a program.
When it is not trurned off, the next
data cannot be received.
9-8