Mitsubishi Electric MELSEC Q Series Reference Manual page 263

7 APPLICATION FUNCTIONS
7 - 27
• LB/LW data flow between stations
Multiplexed remote master station
(master operation)
LB/LW
M R R
0
1FFF
Multiplexed remote master station
LB/LW
M R R
0
1FFF
(5) Discrimination using the indicator LEDs of a multiplexed remote
master station and a 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.
QJ71BR11
RUN MNG
T.PASS D.LINK
SD RD
ERR. L ERR.
M
(c) Data transfer
(c) Data transfer
(b)
LB/LW
(a)
M R R
0
1FFF
Remote I/O station
Multiplexed remote master station fails
M
LB/LW
M R R
0
1FFF
Remote I/O station
ON: Master operation (station controlling remote I/O station)
OFF: Sub-master operation
Multiplexed remote sub-master station
(sub-master operation)
LB/LW
M R R
0
1FFF
M
(a)
Multiplexed remote sub-master station
(master operation)
LB/LW
M R R
0
1FFF
M
MELSEC-Q
M
M
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