5
REDUNDANT SYSTEM FUNCTIONS
5.3 The System Switching Function
5.3.4 Both Systems Operations After System Switching
5 - 52
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
(2) Network Module Operations
Refer to each network module manual, for details on a specific network module
operation.
Table5.37 Control System and Standby System Network Operations After System Switching
Item New Control System Network Module New Standby System Network Module
CC-Link IE Controller Network Starts cyclic transmission.
Continues cyclic transmission.
However does not perform output.
MELSECNET/H PLC to PLC
network
Starts cyclic transmission.
Continues cyclic transmission.
However does not perform output.
MELSECNET/H Remote I/O
network
Starts cyclic transmission.
Operates as master station.
Continues cyclic transmission as sub-master station.
However, does not perform output.
Ethernet
Communicates with the control system when it is specified by
external device.
Transfers a message to the standby system when it is
specified by external device.
Communicates with the standby system when it is specified
by external device.
Transfers message to the control system when it is
specified by external device.
PROFIBUS-DP Continues PROFIBUS-DP communications. Stands by and prepares for system switching.
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