VFD modbus interrupt problem found. Than reset the VFD.

VFD modbus interrupt problem found. Than reset the VFD.
Problem: Shutdown time is ACB not open.Problem found: ACB Internal control unit not working found.Observation: DTW 203 UVR checked, When plug PTT UVR…
Previous control cable is damaged by ant .so we replace new control cable
In DTW-104, the optical fiber is broken by lizard in TJ box. We rejoin the optical fiber. Now CCTV can be seen in…
Due to solving those problems : Modbus ground connection check. VFD frequency regulator loose connection check. SPD check . RJ-45 connector check. Cable…
There was so much dust