A0790 alarm in WEG CFW701 Drive indicates an unprogrammed Analog Input for External PID 2. This means the second external PID controller is active, but no analog input is assigned to its process feedback.
Cause:
It indicates to the user there is not analog input programmed for External PID controller 2 feedback. Parameter P0231 or P0236 or P0241 is not programmed in 9.
Remedy:
Configure the designated analog input by setting parameter P0231, P0236, or P0241 to option 9.
