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MELSEC-Q
7 APPLICATION FUNCTIONS
(2) Selection of operating station status when multiplexed remote
master station returns to system
It is possible to set the parameter of the multiplexed remote master station to
select whether the remote I/O stations will be controlled by the multiplexed
remote master station or by the multiplexed remote sub-master station when the
multiplexed remote master station returns to system while the remote I/O stations
are being controlled by the multiplexed remote sub-master station.
POINT
The transient transmission executed when the master operation station is switched
or returns to the system may be unsuccessfully completed. Execute the transient
transmission again if it is unsuccessfully completed.
(a) Return to system as control station:
The multiplexed remote master station returns to the system as the master
operating station (control station).
The multiplexed remote master station controls the remote I/O stations. The
multiplexed remote sub-master station shifts to sub-master operation.
After switching, the outputs of the remote I/O stations are cleared.
Multiplexed remote
master station
Multiplexed remote
sub-master station
Master operation
Remote I/O station Remote I/O station Remote I/O station
Multiplexed remote master station returns to system
Multiplexed remote
master station
Multiplexed remote
sub-master station
Master operation
Sub-master operation
Information
transfer
After switching, outputs are cleared.
Remote I/O station
Remote I/O station Remote I/O station