Allen-Bradley · MicroLogix 1400 Programmable Controllers
The total output pulses to be generated (TOP) for the PTOX instruction are less than zero. This error faults the controller and indicates an invalid motion parameter, as pulse counts must be non-negative. It can be cleared by logic within the User Fault Routine.
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Adjust the total output pulses (TOP) value in the PTOX instruction to be zero or a positive value.
Review the program logic that writes to the TOP parameter to ensure it calculates and sets a valid pulse count.
Clear the fault using the User Fault Routine or by cycling power after correcting the TOP value.