Internal Error (SM560-S)

What does E2-3 mean?

The SM560-S Safety PLC has encountered an unspecified internal error. This indicates a system malfunction that prevents normal operation and requires intervention.

• Generic internal hardware malfunction on the SM560-S, possibly a low-level component failure.
• Deep-level firmware corruption or bootloader issue.
• Critical internal resource contention or memory allocation error.
• Transient voltage event causing permanent damage to internal logic.
• Unexpected operating environment conditions (e.g., extreme cold) causing instability.

Click steps to track your progress.

1. 1

   1. Perform a controlled power down and restart sequence for the entire safety system.

2. 2

   2. Check the physical condition of the SM560-S module for any visible damage or component failures.

3. 3

   3. Log in to the engineering software and check the 'PLC Information' tab for hardware revision details and compare with documentation.

4. 4

   4. Re-download the safety application program to ensure all configuration and logic are correctly loaded.

5. 5

   5. Replace the SM560-S Safety PLC module if the internal error persists after standard troubleshooting steps.