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ErrorLib — Industrial Fault Code Library

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2220H

Incompatible OS Version with 1-Word Setting

Mitsubishi Electric · MELSEC iQ-R Motion Controller

What does 2220H mean?

This moderate error arises when the operating system software version is "25" or earlier, and the MT Developer2 options screen has the number of words used set to "1 word". This incompatibility causes an error upon powering on a Multiple CPU system after installation, as the older OS does not support this 1-word setting.

Common Causes

  • Operating system software version is "25" or earlier.
  • "Number of words used" setting in MT Developer2 options is configured to "1 word".

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the operating system software version; it must be "26" or later for 1-word setting functionality.

  2. 2

    Check the "Number of words used" setting in the MT Developer2 options screen; if using OS version 25 or earlier, it must not be set to "1 word".

  3. 3

    Update the operating system software to version "26" or later.

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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