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4223

No enable for controller and/or feed (Master axis)

Beckhoff · TwinCAT 2 NC

¿Qué significa 4223 ?

The necessary enable signals for the master axis, such as the controller enable or direction-dependent feed enables (via the PlcToNc interface), are not active. Without these enables, the axis controller cannot operate, preventing any motion or positioning tasks from executing. This is a critical safety interlock.

Causas comunes

  • Controller enable signal (e.g., 'NC_Enable_Axis[n]' bit in PlcToNc interface) is not active from the PLC.
  • Feed enable signal (e.g., 'NC_Feed_Forward_Axis[n]' or 'NC_Feed_Backward_Axis[n]') is not active for the commanded direction.
  • Safety circuit open (e.g., E-Stop, light curtain, door interlock) preventing drive or controller enable.
  • PLC logic fault preventing the necessary enable signals from being set to the NC controller.
  • NC configuration parameter (e.g., P4-15 'EnableSource') incorrectly set to an unused or invalid input.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    1. Verify the PLC logic is setting the appropriate 'NC_Enable_Axis[n]' and direction-dependent 'NC_Feed_Axis[n]' bits in the PlcToNc interface.

  2. 2

    2. Check the state of the NC controller enable input (e.g., terminal X10, input 1) using a multimeter (expecting 24VDC).

  3. 3

    3. Inspect the machine's safety circuit for open contacts (e.g., E-Stop buttons, door interlocks) and reset if needed.

  4. 4

    4. Review the axis configuration parameter P4-15 ('EnableSource') to ensure it is correctly mapped to the PLC interface or a hardware input.

  5. 5

    5. Manually toggle the enable bits from the NC diagnostic interface (if available) to isolate PLC vs. NC issues.

  6. 6

    6. Check the drive status for specific errors that might prevent its readiness, leading to lack of enable.

Ver todos los códigos en este manual (60)
Datos técnicos verificados. Última actualización: March 2026

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