Mitsubishi FX3U-232-BD User Manual page 479

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
2) When only receiving is executed [The DR (DSR) signal is not used.]
RS
instruction
driving
RD (RXD)
Receive data
ER (DTR)
Receiving
complete
M8123
3. When the control line is in the modem mode
RS
instruction
OFF ON
driving
SD (TXD)
Send data
Sending
OFF
request
M8122
Sending wait
flag
M8121
OFF
ER (DTR)
RD (RXD)
Receive data
Receiving
complete
M8123
DR (DSR)
*1. Set it to 2 scan times or more in FX
OFF ON
OFF ON
OFF
Reset it in a sequence program. While it remains ON, the PLC cannot receive
the next set of data.
Message
1
ON
OFF
ON
OFF
100 µs
or
more *1
OFF
1S
Message
1
ON
Message
3
ON
Message
2
ON
Reset it in a sequence program.
While it remains ON, the PLC cannot
receive the next set of data.
ON
, FX , FX (FX), FX , FX
0N 2 2C 1N
6 Creating Programs (RS Instruction)
6.3 Operation of Control Line
Message
2
ON
, and FX PLCs.
1NC
A
B
C
D
E
F
G
H
I
Apx.
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