1161

RAM ERROR

Mitsubishi Electric · MELSEC System Q/L Series

What does 1161 mean?

The data of the device memory built in the CPU module is overwritten. This indicates a corruption or unintentional modification of data within the CPU's internal device memory.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Take noise reduction measures.

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Verified technical data. Last updated: March 2026

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Source: Mitsubishi Electric MELSEC System Q/L Series
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