Your VFD does not need 3phase, it can be wired Single Phase just as it is, when you say 230v single phase, I guess you are not in the USA as there single phase connection would be120v / 240v
So all you do is connect your, I'm guessing here because you don't say where you live, ( 1 ) Hot wire to the L1 / R terminal and your Neutral to the L2 / S Terminal and Ground to the Ground Connection and you will be running
You also have to set the correct Parameters for the motor /spindle you want to run, these will be all the motor spec's, and most important is the Frequency of the motor / spindle