How do I set up automatic switching between PLCs of the same type using Ethernet communications when one PLC is unavailable.
If communication to one PLC is lost, the HMI has the ability to look for, find, and establish communications with another PLC.
To do this, the PLCs on the network must all use the same protocol. If no PLC has communication established when the project is originally downloaded, the HMI project will not automatically search for another PLC.
See Tech Note 5081, "Auto-Switching Between PLCs."