Internal Error (SM560-S)

What does E2-52 mean?

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

• Unspecified internal hardware fault within the SM560-S module (e.g., CPU, bus, ASIC failure).
• Severe corruption of the operating system or bootloader firmware.
• Transient power disturbance affecting internal logic leading to an unrecoverable state.
• Overheating of internal components due to inadequate cooling within the control cabinet.
• External electromagnetic interference (EMI) causing critical internal register corruption.

Click steps to track your progress.

1. 1

   1. Cycle power to the SM560-S Safety PLC by turning off and on the 24VDC supply for at least 10 seconds.

2. 2

   2. Check the event log or diagnostic buffer in the engineering software for any preceding warnings or associated sub-codes.

3. 3

   3. Monitor the PLC's internal temperature via diagnostic tools (if available) to ensure it is within the specified operating range (e.g., 0-55°C).

4. 4

   4. Attempt to re-download the latest compatible firmware for the SM560-S module.

5. 5

   5. Replace the SM560-S Safety PLC module if the internal error persists after power cycling and firmware update.