Allen-Bradley · Logix 5000 Advanced Process Control and Drives
The PATT instruction tried to take ownership of the equipment phase, but the executing program already possesses ownership. This often occurs when the instruction is repeatedly executed.
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Ensure the PATT instruction is executed only once per state transition, or limit its execution to a single scan.
Implement logic to check for existing ownership (e.g., using this result code 24582) before attempting to re-take ownership.
Verify that a Detach from Equipment Phase (PDET) instruction is used to release ownership when program control is no longer required.