F00B

Privilege error; access denied

Allen-Bradley · Logix 5000

What does F00B mean?

Access to the requested function or resource was denied due to insufficient privileges. This is a security or access control related error.

Common Causes

  • Privilege error; access denied

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the currently logged-in user's privileges and assigned security roles within FactoryTalk Security or Studio 5000 for the specific Logix 5000 controller.

  2. 2

    Check the Logix 5000 controller's security policy settings and user access configuration in Studio 5000 for restricted functions.

  3. 3

    Inspect the FactoryTalk Security logs or controller audit trails for detailed information regarding the access denial event.

  4. 4

    Confirm network connectivity and authentication server (e.g., Active Directory, FactoryTalk Directory) status if security is managed externally.

  5. 5

    Review the specific function or resource attempted to be accessed, and identify the required privilege level for that operation.

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Verified technical data. Last updated: March 2026

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