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Allen-Bradley · MicroLogix 1400 Programmable Controllers

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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.

Vanlige årsaker

  • Total output pulses (TOP) parameter set to a negative value.
  • Incorrect calculation or direct input of a negative TOP parameter in the PTOX instruction.

Reparasjonssteg & Sjekkliste

Klikk på steg for å spore fremgangen.

  1. 1

    Adjust the total output pulses (TOP) value in the PTOX instruction to be zero or a positive value.

  2. 2

    Review the program logic that writes to the TOP parameter to ensure it calculates and sets a valid pulse count.

  3. 3

    Clear the fault using the User Fault Routine or by cycling power after correcting the TOP value.

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Verifisert teknisk data. Sist oppdatert: March 2026

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Kilde: Allen-Bradley MicroLogix 1400 Programmable Controllers