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ErrorLib — Industrial Fault Code Library

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10210000 hex

Illegal User Program Execution ID

Omron · NX-series CPU Unit

What does 10210000 hex mean?

The user program execution ID configured in the user program does not match the ID set in the CPU Unit. This error is detected during user program download, power ON, or Controller reset. When this mismatch occurs, the user program and CPU Unit operation will stop, requiring a power cycle or Controller reset to clear the fault.

Common Causes

  • The user program execution ID in the user program does not match the ID configured in the CPU Unit.
  • A user program execution ID is set in the CPU Unit, but no ID is defined within the user program itself.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set the same user program execution ID in both the user program and the CPU Unit.

  2. 2

    If the user program does not have an execution ID set, clear the execution ID stored in the CPU Unit by clearing all memory in the CPU Unit.

  3. 3

    Keep a record of the user program execution IDs set in both the user program and in the CPU Unit, as they are not displayed.

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
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