Hi, If your tornado is equipped in SSM Board, you need to use procedure as bellow
If, with the link, LK2, in the right hand position, +5A, the push button on the SSM is held down while the main isolator is switched on as described above to delete the Alarm History, but then is
held longer, the SSM display cycles around the available maximum spindle speed settings
When the required maximum speed is displayed releasing the push button writes this value to the SSM memory.
The main isolator must now be switched off and the link restored to its normal position
Good Luck
In case SSM failure I can offer to repair it.