Appendix 12Program For System Switching At Built-In Ethernet Communication Error - Mitsubishi Electric MELSEC iQ-R Series User Manual

Appendix 12
In the redundant system, the CPU module (built-in Ethernet port part) does not issue a system switching request even though
a communication error has been detected at the own station side. Therefore, use a program shown in this section to execute
the system switching instruction so that communications continue even at the error.
The figure below shows built-in Ethernet communication errors that can be detected by the program.
(1)
(2)
(3)
(4)
(1) Cable disconnection from the connector of the built-in Ethernet port
(2) A break in the cable connecting the built-in Ethernet port and the hub
(3) Cable disconnection from the connector of the hub
(4) Power-off of the hub
The following is the program example.
Create this program as a program executed in both systems, and exclude the devices used for the program from the tracking
transfer targets.
Program for System Switching at Built-in
Ethernet Communication Error
Appendix 12 Program for System Switching at Built-in Ethernet Communication Error
A
APPX
745