Allen-Bradley · MicroLogix 1400 Programmable Controllers
An invalid output has been specified for a PTOX instruction. Only Output 2, Output 3, and Output 4 are valid choices. This is a configuration error that causes the controller to fault, and the User Fault Routine does not execute.
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Verify the PTOX instruction is configured to use a valid physical output (Output 2, Output 3, or Output 4).
Correct the output address specified in the PTOX instruction within the ladder program to one of the valid options.