F235 fault in WEG CFW900 Drive indicates a CANopen Off-line condition. This means the CANopen network lost synchronization and timed out before receiving the expected master telegram, triggering a trip.
Cause:
It occurs if the state of the CANopen node changes from operational to pre-operational.
- The master is not sending the guarding/heartbeat telegrams at the programmed time.
- Communication problems caused by lost telegrams or transmission delays.
Note: Check the operation of the error control mechanisms (Heartbeat/Node Guarding).
Remedy:
Check master configuration times and correct. Address network communication lag or noise.
