F0236 fault in WEG CFW500 Drive indicates an Idle Master on the DeviceNet network. This means the DeviceNet PLC master halted unexpectedly or entered an idle state, forcing the drive to fault.
Cause:
- The master operation switch or run-bit is in the IDLE state in the host software.
Remedy:
Configure the master switch or corresponding bit to RUN in the configuration word of the master software. Refer to the documentation of the master device used.