1160

RAM ERROR

Mitsubishi Electric · MELSEC System Q/L Series

What does 1160 mean?

The program memory in the CPU module is overwritten. This suggests an integrity issue with the stored program, potentially due to incorrect writes or memory corruption during program execution.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Take noise reduction measures.

  2. 2

    Format the program memory, write all files to the PLC, then reset the CPU module, and RUN it again. If the same error is displayed again, this suggests a CPU module hardware fault.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Mitsubishi Electric MELSEC System Q/L Series