4300

Axis ID not allowed

Beckhoff · TwinCAT 2 NC

What does 4300 mean?

The value for the axis ID is not allowed because it has already been assigned, is less than or equal to zero, is greater than 255, or does not exist in the current configuration. The allowed range is [1 ... 255]. An invalid axis ID prevents the system from uniquely identifying and controlling the axis, making it inoperable.

Common Causes

  • Attempt to assign an axis ID (e.g., via P1-01) that is already in use by another axis in the system configuration, leading to a conflict.
  • Configuration of an axis ID as zero or a negative value, which is outside the permissible range for axis identifiers (e.g., 1-255).
  • Assignment of an axis ID greater than the maximum allowed value of 255 (e.g., P1-01 set to 256 or higher).
  • The configured axis ID does not exist or is not recognized within the active NC system configuration file.
  • Inconsistent axis ID assignment between the drive parameter (e.g., P1-01) and the higher-level controller's axis mapping.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Review the system's axis configuration table (e.g., in the PLC/NC program) and verify each axis has a unique identifier within the 1-255 range.

  2. 2

    2. Check the axis ID parameter (e.g., P1-01, Axis Number) in the drive configuration for the affected axis and ensure it is between 1 and 255.

  3. 3

    3. Compare the configured axis ID in the drive with the expected axis ID from the master controller's axis mapping or motion profile.

  4. 4

    4. If a new axis is being added, ensure its ID is unique and provisioned correctly in the NC system's hardware configuration file.

  5. 5

    5. Power cycle the drive and controller after making any axis ID configuration changes to ensure they are fully applied and recognized.

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

Related Faults