F237 fault in WEG CFW900 Drive indicates a DeviceNet Connection Timeout. This means the DeviceNet network polling stopped unexpectedly, causing the drive to trip on communication loss.
Cause:
It indicates that one or more DeviceNet I/O connections has expired. It occurs when, for some reason, after the cyclical communication between the master and the product has started, this communication is interrupted.
- Check the status of the network master.
- Check network installation, broken cable or fault/poor contact on the connections with the network.
Remedy:
Check DeviceNet master state. Inspect physical network cables for breaks or loose connections.
