Description
In control cabinet arg, drive unit at unit location arg is not connected to the serial measurement board (SMB) link.
Consequences
The system enters a system fault state.
Possible causes
The drive unit inside or outside the cabinet may be faulty or the SMB cable may be disconnected.
Recommended actions
- Verify that the SMB cable is connected to the drive unit inside the cabinet.
- Verify that the SMB signal cable is connected to the cabinet.
- Switch the SMB connection cable and restart the controller.