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ErrorLib — Industrial Fault Code Library

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24579

HMI or Logix Designer Owns Equipment Phase

Allen-Bradley · Logix 5000 Advanced Process Control and Drives

What does 24579 mean?

The PATT instruction attempted to take ownership, but the equipment phase is currently owned by Logix Designer or an HMI, which holds higher priority. The program can attach but cannot command. This scenario is specific to CompactLogix 5370 and ControlLogix 5570 controllers.

Common Causes

  • Another higher-priority interface (Logix Designer, HMI) has an active ownership claim on the equipment phase.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Determine if the equipment phase is currently being manually controlled via Logix Designer or an HMI.

  2. 2

    If manual control is not intended, ensure the HMI or Logix Designer relinquishes ownership of the equipment phase to allow program control.

Browse all codes in this manual (19)
Verified technical data. Last updated: April 2026

Related Faults

20Major Fault - Out of Range Value24577Invalid Command24578Command Invalid for Current State (PCMD/SCMD)
Source: Allen-Bradley Logix 5000 Advanced Process Control and Drives
Open Manual (Page 412)Search more codes in this manual