Error message

Parallel operation not possible

Cause of error

- A reference run was started in one axis by PLC module, then the M function was acknowledged before the reference run could finish. As a result the NC program cannot continue.
- You attempted to start a hard disk check while the TNC was still running an NC program.

Error correction

- Inform your service agency
- Do not start a hard disk check while the TNC is still running an NC program.