Failure of 2 consecutive MDT signals

What does F402 mean?

The DIAX04 SSE-03VRS drive failed to receive two consecutive Master Data Telegrams (MDT) from the master controller. The MDT carries critical command and data information. This is a communication breakdown, indicating that the drive is not receiving necessary instructions, leading to an immediate shutdown to prevent uncontrolled operation.

• Interruption or severe degradation of the real-time communication link (e.g., Sercos) to the DIAX04 SSE-03VRS drive.
• Master controller experiencing issues transmitting MDTs or is temporarily halted.
• Faulty communication interface or hardware on the DIAX04 SSE-03VRS drive.
• Incorrect network configuration or timing parameters (e.g., S-0-0012) causing data loss.
• Excessive electromagnetic interference impacting communication signal integrity.

Click steps to track your progress.

1. 1

   Inspect the communication cable (e.g., fiber optic, Ethernet) connecting the DIAX04 SSE-03VRS drive to the master controller. Check for physical damage, proper termination, and secure connections.

2. 2

   Verify the status of the master controller and ensure it is actively transmitting MDTs. Check its diagnostic logs.

3. 3

   Check communication ring integrity (if applicable) for breaks or faulty nodes. Bypass or isolate sections to identify the problematic segment.

4. 4

   Review and verify communication parameters (e.g., S-0-0012, S-0-0013) in the DIAX04 SSE-03VRS drive and the master controller for consistency.

5. 5

   Monitor communication diagnostic indicators on both the master and the DIAX04 SSE-03VRS. If the fault persists, consider a faulty communication interface on the drive.