F0235 fault in WEG CFW500 Drive

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F0235 fault in WEG CFW500 Drive indicates a Node Guarding or Heartbeat error. This means the CANopen network timed out before receiving the next expected master telegram, triggering a fault trip. 

Cause:

  • Mismatched message exchange times between the master and slave.
  • Master controller is not sending guarding telegrams within the assigned interval.
  • Transmission delays or signal loss on the communication line.


Remedy:

Check times configured on both master and slave. To prevent conflicts, set the slave's error detection time to be a multiple of the master's exchange interval. Verify guarding telegram transmission.

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