The problem is as follows:
there is
-Two 315-2DP + CP 343-1 LEAN controller with redundant periphery ET200M.
-one panel HMI KP300 Basic
Program controllers written in Step 7 v 5.5. Backup works (Master controllers are changing roles \ Slave). For writing panel I use TIA Portal v.13.
The question is: How can I make the panel realized with the CP of the controller to talk to her right now (who is now Master)?