Description
In drive module arg, drive unit at unit position arg indicates that the serial measurement board is missing.
Possible causes
- Poor connection or damage to the serial measurement board cable.
- Serial measurement board 24 V Power supply defective.
- SMB 24 V Power supply short circuit or overcurrent.
- interference.
Recommended actions
- Check system configuration parameters.
- Check the serial measurement board connections and cables.
- Replace the serial measurement board.