Fanuc · Series 30i/31i/32i-MODEL B Plus
This internal alarm indicates an interruption in serial communication, possibly due to a disconnected cable, a Pulse coder failure, or electrical noise. Loss of serial data communication prevents the control unit from receiving vital feedback information.
Click steps to track your progress.
Check whether the feedback cable is not disconnected and whether the connector is properly plugged.
Replace the Pulsecoder.