Raider,
Here are absolute minimum settings on the WJ-200 for my 400Hz 2.2kW spindle. It assumes that you are manually running the spindle from the control panel (ie not from an external source). Change the various max freqs back to 300Hz if this is the limit of your spindle.
1. Select the digital operator as the source of motor speed command (A001=02). Also set the run-time motor speed with F001 (say 400Hz).
2. Select the digital operator as the source of the RUN command (A002=02).
3. Set the motor base & max frequency (A003=400Hz, A004=400Hz) and AVR voltage of the motor (A082=240V).
4. Set the motor current for proper thermal protection (B012=your spindle's max rated current, mine is 9A).
5. Set the number of poles for the motor (H004=2).
Spindle should then power up when you hit the 'START' button. Don't forget to set the 'F001' starting frequency as the motor won't move without this.