Mitsubishi Electric MELSEC Q Series Reference Manual page 264

7 APPLICATION FUNCTIONS
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(6) Program example to transfer data between a multiplexed remote
master station and a multiplexed remote sub-master station
The following program example assumes that the same program is used on the
multiplexed remote master station and multiplexed remote sub-master station to
transfer data between the multiplexed remote master station and multiplexed
remote sub-master station.
(a) System configuration
Multiplexed remote
master station
(station No. 0)
Remote I/O station (station No. 2)
(b) LB and LW range assignment
Multiplexed remote
master station
LB0
LB10
LB20
LB40
Multiplexed remote
master station
LW100
LW110
LW120
LW140
(c) Purpose of using the LB/LW for data transfer between a multiplexed remote
master station and a multiplexed remote sub-master station
The LB/LW for data transfer transfers from the multiplexed remote master
station to the multiplexed remote sub-master station the data that are
needed to switch remote I/O station control from the multiplexed remote
master station to the multiplexed remote sub-master station.
Multiplexed remote
sub-master station
(station No. 1)
Multiplexed remote Remote I/O station
sub-master station
Multiplexed remote Remote I/O station
sub-master station
MELSEC-Q
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