Safety Watchdog Time Zero (V2 CPU)

What does 11 mean?

The safety watchdog time value (F_WD_Time) is 0 ms in an AC500 V2 non-safety CPU PM5xx system. This indicates an invalid or unconfigured watchdog timer, critical for maintaining safe PROFIsafe communication.

• Safety watchdog timer in the V2 CPU has expired.
• Application program is not executing within the expected time frame.
• Program logic is too slow or has a deadlock.
• Incorrect F_WD_Time parameter value.

Click steps to track your progress.

1. 1

   Check the safety PLC configuration for the "F_WD_Time" parameter.