A0780 alarm in WEG CFW500 Drive indicates an unprogrammed Analog Input for the External PID. This means the external PID controller is active, but no analog input is assigned to its process feedback.
Cause:
Parameter P0231 or P0236 was not programmed for option 8.
Remedy:
Set parameter P0231 or P0236 to option 8 to correctly route the external PID process feedback.
