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ErrorLib — Industrial Fault Code Library

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100B0000 hex

Non-volatile Memory Data Corrupted

Omron · NX-series CPU Unit

What does 100B0000 hex mean?

A critical file required by the Controller, stored in non-volatile memory, is either missing or has become corrupted. This error is detected at power-on or during a Controller reset, leading to a major fault level that stops both the user program and Controller operation.

Common Causes

  • The Controller's power supply was interrupted or turned OFF while the BUSY indicator was lit, indicating an active memory operation.
  • Momentary power interruption to the Controller while the BUSY indicator was lit.
  • Failure of the CPU Unit hardware.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Perform a Memory All Clear operation on the Controller and then download the project from Sysmac Studio.

  2. 2

    Measure the incoming power supply voltage and frequency to the Controller. Ensure it consistently meets the specified rated voltage and frequency for stable operation.

  3. 3

    If the error persists after performing memory clear and verifying power supply, replace the CPU Unit.

Browse all codes in this manual (17)
Verified technical data. Last updated: April 2026

Related Faults

00090000 hexDIP Switch Setting Error000D0000 hexInternal Bus Check Error000E0000 hexNon-volatile Memory Life Exceeded
Source: Omron NX-series CPU Unit
Open Manual (Page 256)Search more codes in this manual