A0784 alarm in WEG CFW500 Drive indicates an unprogrammed Analog Output for the External PID. This means the external PID controller is active, but its output signal isn’t mapped to an analog terminal.
Cause:
Parameter P0251 or P0254 was not programmed for option 16.
Remedy:
Configure parameter P0251 or P0254 to option 16 to set the analog output target.
