Hitachi P1 VFD Installation And Manual page 14

If your P1 is setup as a Mach spindle (under MachMotion Parameters), click on Configure -> Control
at top of the Mach screen. Then select the "Spindle" tab shown in Figure 7. Set your max spindle
RPM for each spindle range here.
(Figure 7 Spindle Tab)
If your VFD is enabled as an Auxiliary spindle (under MachMotion Parameters), set the Auxiliary
Control Max RPM to the max RPM of the motor.