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MELSEC-Q
7 APPLICATION FUNCTIONS
The link special relays used to switch multiplexed remote sub-master station operation
Number Name Description
SB0014 Remote sub-master station switching
command
Forcibly directs the remote sub-master station that is performing
master operation to shift to sub-master operation (invalid for
redundant systems).
OFF : Without directive
ON : With directive
SB01C4 Remote sub-master station switching
acceptance status
Indicates the status of accepting the directive to shift from master
operation to sub-master operation.
OFF : Without acceptance
ON : With acceptance
SB01C5 Remote sub-master station switching
status
Indicates the operation status of a shift from master operation to
sub-master operation.
OFF : Without shift
ON : Shift completion
Program example
Switching command
R master
baton pass
status
R master
cyclic
transmission
R sub-master
switch
acceptance
R sub-master
switch
status
R sub-master
switch
command
R sub-master
switch
command