Mitsubishi FX3U-232-BD User Manual page 558

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (FX
5.5 Operation of Control Line
5.5.1 When control line is not provided [BFM #0, (b9, b8) = (0, 0)]
OFF
ON
Sending/
receiving enable
(BFM#1 b0)
Sending OFF
command
(BFM#1 b1)
SD(TXD)
Send data
Time set by BFM #20
multiplied by 10 ms
OFF
Sending
complete
(BFM#28 b0)
RD(RXD)
Receive data
OFF
Receiving
complete
(BFM#28 b1)
Receiving
OFF
complete flag
The receiving waiting
reset command
status is started.
(BFM#1 b2)
G-30
-232IF)
2N
Set this bit to OFF in the sequence
program. While it remains ON,
the next data cannot be sent.
ON
Message 1
ON
Message 2
ON
After receiving is completed and the received
data is read, set the receiving complete flag
(BFM #28, b1) to OFF using the receiving
complete flag reset command.
Message 4
Time set by BFM #20
multiplied by 10 ms
Message 3
Set this bit to OFF in the
sequence program.
While it remains ON, the
next receiving complete
flag reset command
cannot be given.
ON
5 Creating Programs
5.5 Operation of Control Line
Set this bit to OFF in the sequence program
While it remains ON, the next receiving
complete flag reset command cannot be
given.