18-9

Absolute Position Recovery (APR) fault

Allen-Bradley · Logix 5000

What does 18-9 mean?

An Absolute Position Recovery (APR) fault has occurred, and the absolute position of the axis cannot be recovered. This impacts the accuracy and safety of motion control.

Common Causes

  • An Absolute Position Recovery (APR) fault has occurred and the absolute position of the axis cannot be recovered

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    See the APR Fault to determine the cause of the fault to determine corrective action.

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Verified technical data. Last updated: March 2026

Related Faults

17-37Controller recovered from internal temperature fault12-33Unpartnered controller in primary chassis18-5Motion fault occurred
Source: Logix 5000
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