6
REDUNDANT SYSTEM NETWORKS
6.2 Redundant System Network Overview
6.2.4 CC-Link
6 - 34
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
TRACKING CABLE
4
PROCEDURE FOR
STARTING UP A
REDUNDANT SYSTEM
5
REDUNDANT SYSTEM
FUNCTIONS
6
REDUNDANT SYSTEM
NETWORKS
7
PROGRAMMING
CAUTIONS
8
TROUBLESHOOTING
(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.
Diagram 6.28 Operation When System Switching Is Manually Carried Out
Master Station
(Station No. 0)
Standby Station
(Station No. 1)
Master Station
(Station No. 0)
Standby Station
(Station No. 1)
Submit SP. CONTSW
instruction
CC-Link
Remote I/O station
(station No. 2)
CC-Link
Remote I/O station
(station No. 2)
Control system
Standby system
Tracking cable
Control
system
Standby
system
Tracking cable
Control
System
Standby
System
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