Mitsubishi Q12PRHCPU User Manual page 257

6
REDUNDANT SYSTEM NETWORKS
(c) When System Switching is Manually Carried Out
When system switching is manually carried out, the new control system takes
over the control of the redundant system.
However, the new standby system master station does not switch to the standby
master station, as it can communicate with remote stations.
Also, the new standby system master station remains as the standby station and
cannot control remote stations as the master station.
As a result, the new control system is unable to control the CC-Link.
Make sure to switch the data link control from the standby master station to the
master station using the new control system's program.
Refer to Appendix 4 for program details.
Control system
Control Standby
system System
Submit SP. CONTSW
instruction
Diagram 6.28 Operation When System Switching Is Manually Carried Out
Master Station
(Station No. 0)
Standby system
Tracking cable
CC-Link
Master Station
(Station No. 0)
Standby Control
system System
Tracking cable
CC-Link
6.2 Redundant System Network Overview
Standby Station
(Station No. 1)
Remote I/O station
(station No. 2)
Standby Station
(Station No. 1)
Remote I/O station
(station No. 2)
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6.2.4 CC-Link
1
2
3
4
5
6
7
8