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

What does 4223 mean?

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.

• 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.

Click steps to track your progress.

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.