Keyswitch mismatch after switchover

What does 12-34 mean?

Immediately after a switchover, the keyswitch positions of the primary and secondary controllers are mismatched. Specifically, the old primary is in Program mode and the new primary is in Run mode.

• Keyswitch positions of primary and secondary controllers mismatched after switchover
• Old primary controller in Program mode, new primary in Run mode

Click steps to track your progress.

1. 1

   Change the keyswitches from Run to Program to Run mode twice to clear the fault.

2. 2

   Use the Logix Designer application to go online with the controllers, then clear the faults and change both the controllers' modes to Run.