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MELSEC-Q
7 APPLICATION FUNCTIONS
• LB/LW data flow between stations
0
1FFF
LB/LW
M R R M
0
1FFF
LB/LW
0
1FFF
LB/LW
(a)
(b)
0
1FFF
LB/LW
(a)
0
1FFF
LB/LW
0
1FFF
LB/LW
Multiplexed remote master station
(master operation)
Multiplexed remote sub-master station
(sub-master operation)
(c) Data transfer
(c) Data transfer
Remote I/O station
Remote I/O station
Multiplexed remote master station
Multiplexed remote sub-master station
(master operation)
Multiplexed remote master station fails
M R R M
M R R M
M R
R M
M R
R M
M R
R M
(5) Discrimination by LED indications of multiplexed remote master
station and multiplexed remote sub-master station
It is possible to confirm either of the multiplexed remote master station or
multiplexed remote sub-master station is controlling the remote I/O stations by
ON/OFF status of the MNG LED on the corresponding station.
RUN MNG
T.PASS D.LINK
SD RD
ERR. L ERR.
QJ71BR11
ON: Master operation (station controlling remote I/O station)
OFF: Sub-master operation
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