Mitsubishi Electric MELSEC-Q Series - System Switching Request to Control System CPU

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CHAPTER 4 FUNCTIONS
4
4.7 Redundant-CPU-Compatible Function 4.7.2 System switching request to control system CPU
4.7.2 System switching request to control system CPU
Once the CC-Link IE Controller Network module on the same base as the control system CPU detects a data link error,
it issues a system switching request to the control system CPU.
Depending on the operation status (power OFF, stop error, etc.) of the standby system, however, system switching
may not be executed.
For details, refer to the following.
QnPRHCPU User's Manual (Redundant System)
CC-Link IE Controller Network
Control
system
Control
system
Standby
system
Standby
system
Tracking cable
Communication
error
CC-Link IE Controller Network
Tracking cable
Communication
error
System switching
request
System switched
Control
station No.3
Normal
station No.4
Disconnected
station No.1
Normal
station No.2
Control
station No.3
Normal
station No.4
Disconnected
station No.1
Normal
station No.2