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ErrorLib — Industrial Fault Code Library

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ERR

Built-in Memory Clear Error

Mitsubishi Electric · MELSEC iQ-R Motion Controller

What does ERR mean?

This error indicates that a problem was detected during the built-in memory clear process on the Motion CPU module. This suggests an issue with the module's memory hardware or the clear operation itself, preventing successful memory initialization.

Common Causes

  • Hardware error detected during built-in memory clear operation
  • Failure to successfully clear the built-in memory

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Exchange the Motion CPU module.

Browse all codes in this manual (19)
Verified technical data. Last updated: April 2026

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Source: Mitsubishi Electric MELSEC iQ-R Motion Controller
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