F0787 fault in WEG CFW701 Drive indicates a Low Level of the External PID 1 Process Variable. This means the external PID feedback sensor remained below the safe threshold, triggering a system fault.
Cause:
Parameter P1075 is programmed in 2 and the External PID controller 1 Feedback value is remaining below the value programmed in P1076 for the time programmed in P1077.
Remedy:
Check the physical process line and feedback loop sensors. Verify the parameter configurations for P1075, P1076, and P1077.
