Ok, i understand- You know nothing of electricity so that's why you ask.

let me explain then: When we say power supply, means that there is a transformer that transforms and rectifies the 230V to some low voltage 5-24-70V . The BOB usually needs 5-24VDC to work. The drives need 24-70VDC to work and the VFD spindle side 230VAC, so though one cable powers the whole machine inside transformers change that 230VAC to the needed VDC. So you will need to isolate the VFD with a separate cable so you plug it directly in the 230VAC. The spindle is powered by the VFD so you need only to disconnect the VFD input from the machine and set it up with separate plug. Then You Plug the cable that powers the machine now in separate UPS. Thats all.

Now you understand? Or you still need some help. maybe you make pictures and we can help better.