Mitsubishi Electric MELSEC Q Series Reference Manual page 233

6 PROGRAMMING
No.
Baton pass status of the remote master
SB0071
station
Remote sub-master station transient
SB0072
transmission status
Cyclic transmission status of the remote
SB0075
master station
Remote sub-master station cyclic
SB0076
transmission status
Remote master station cyclic
SB0077
transmission control status
No.
Remote sub-master station switching
SB0014
command
Remote sub-master station switching
SB01C4
acceptance status
Remote sub-master station switching
SB01C5
status
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(11) Operation status check and operation switching of the multiplexed
remote master function
The operation of the multiplexed remote master function can be checked or
switched with link special relays (SB) and link special registers (SW).
(a) Checking the operation status of the multiplexed remote
master station
1) If an error occurs in data link, any of the following link special relays
(SB) is turned ON.
• Baton pass status of the remote master station (SB0071)
• Remote sub-master station transient transmission status (SB0072)
• Cyclic transmission status of the remote master station (SB0075)
• Remote sub-master station cyclic transmission status (SB0076)
2) The type of the station that is controlling the cyclic transmission
(remote master or remote sub-master station) can be checked in
Remote master station cyclic transmission control status (SB0077).
Description
(b) Operation switching of the multiplexed remote master station
1) When Remote sub-master station switching command (SB0014) is
turned ON, the remote sub-master station running as a master is
forced to operate as a sub-master station.
2) When the remote sub-master station running as a master accepts the
switching, Remote sub-master station switching acceptance status
(SB01C4) is turned ON.
3) Upon completion of switching from master operation to sub-master
operation, Remote sub-master station switching status (SB01C5) is
turned ON.
4) If the switching fails, an error code is stored in Remote sub-master
station switching result (SW01C4).
Description
No.
—
No.
Remote sub-master station switching
SW01C4
result
MELSEC-Q
Description
Description
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