The speed you have commanded is faster than the max setting you have for the pulley you are in. If you go to the Config menu then down to Spindle Pulleys you can set your max there for each pulley you have. You can enter the pulley you are in on the Settings page.
If you dont have any gearboxes or change pulleys on the spindle just set Pulley 1 to the max speed you can get and then make sure that on the settings page it is set to pulley 1.
Hood