Safety input signals wrong, counter

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The DIAX04 SSE-03VRS drive's safety module detected an error in the counter value of the received safety input signals. Safety protocols often use counters to ensure telegrams are received in the correct order and are not delayed or replayed. A counter mismatch indicates a timing, communication, or integrity issue with safety data, leading to a critical safety fault.

• Delayed or lost safety data telegrams due to communication link issues (e.g., network congestion, cable damage).
• External safety PLC or safety communication module transmitting incorrect or out-of-sequence counter values.
• Faulty communication interface on the DIAX04 SSE-03VRS drive or the external safety device.
• Timing discrepancies or synchronization issues between the external safety device and the DIAX04 SSE-03VRS drive.
• Severe electromagnetic interference corrupting safety data packets.

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1. 1

   Inspect the safety communication link (e.g., Profisafe, F-Link) cabling for damage, proper shielding, and termination.

2. 2

   Verify the status and diagnostic logs of the external safety PLC or safety communication module for any communication errors or timing issues.

3. 3

   Ensure that the safety communication configuration and timing parameters (e.g., watchdog times) are identical and compatible between the external safety device and the DIAX04 SSE-03VRS drive.

4. 4

   Check for sources of excessive electromagnetic interference near the safety communication cables.

5. 5

   Perform a full power cycle of the DIAX04 SSE-03VRS system and the external safety device. If the fault persists, consider a faulty safety communication interface on the drive.