Invalid number of auxiliary axes
Beckhoff · TwinCAT 2 NC
What does 42F0 mean?
The locally configured number of auxiliary axes does not match the globally defined number of auxiliary axes in the system. This inconsistency can lead to errors in kinematic transformations, uncoordinated motion, or misinterpretation of motion commands involving auxiliary axes.
Common Causes
- Inconsistent configuration between the kinematic transformation definition and the NC group setup regarding the number of auxiliary axes.
- Manual configuration error where the count of auxiliary axes specified in the NC group properties does not match the kinematic definition.
- Loading a partial or incompatible configuration file where global and local auxiliary axis counts diverge.
- A specific component responsible for kinematics (e.g., a function block like MC_Kinematic) is configured with a different number of auxiliary axes than the NC group.
- System update or migration causing a mismatch in how auxiliary axes are referenced or counted across different configuration layers.
Repair Steps & Checklist
Click steps to track your progress.
- 1
1. Access the NC configuration in the development environment (e.g., TwinCAT System Manager).
- 2
2. Compare the number of auxiliary axes defined within the kinematic transformation object to the number configured in the NC group properties.
- 3
3. Adjust the number of auxiliary axes in either the kinematic transformation or the NC group to ensure they are identical.
- 4
4. Rebuild and download the entire NC configuration to the controller.
- 5
5. Perform a full controller restart to reinitialize all axis and group definitions consistently.