11

Safety Watchdog Time Value is 0 ms (F_WD_Time)

ABB · AC500 Function Block Libraries

What does 11 mean?

The PROFIsafe watchdog time parameter (F_WD_Time) in the safety PLC configuration is set to 0 milliseconds. A zero value is invalid and effectively disables the watchdog, which is critical for monitoring the timeliness of safety communication. Without a functioning watchdog, communication failures or system freezes might go undetected, posing a significant safety risk.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Download the updated configuration to the safety PLC.

Source: ABB AC500 Function Block Libraries
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