Two options here:
1. Use the time based waits.
2. Use VFD outputs.
For #1, you must enter the spindle ramp times in the Spindle tab for each range. Range 0 is the default range.
For #2, if your VFD has output for "at speed" and "at zero", simply wire them to an input on your controller or I/O device. Then map those inputs to the ISIG_AT_SPEED and ISIG_AT_ZERO signals.
Steve