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MELSEC-Q
7 APPLICATION FUNCTIONS
(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
Remote I/O station (station No. 2)
Multiplexed remote
master station
(station No. 0)
Multiplexed remote
sub-master station
(station No. 1)
(b) LB and LW range assignment
LB0
LB10
LB20
LB40
Multiplexed remote
master station
Multiplexed remote
sub-master station
Remote I/O station
LW100
LW110
LW120
LW140
Multiplexed remote
master station
Multiplexed remote
sub-master station
Remote I/O station
(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.