I'm setting up my servo spindle with 0-10V control.  I have the quadrature encoder wired in, so I wanted to know if there is any need to wire in the outputs from the VFD for "Speed reach" and "zero speed" since the control is using the encoder it should already know? 
It also has a "warn output" which I'm guessing is to let the control know if there is an issue with the VFD.  How would I go about wiring this in correctly?
Thanks!

Mike

Since Mach has those inputs I'm going to go ahead and wire them in and use them.

I've got another question on this subject. Is there a way to have Hicon and/or Mach4 auto-adjust the voltage to keep the spindle speed at the set speed? I got my spindle running tonight finally. I noticed that the actual speed is a bit lower than the commanded speed. It's setup as 0-10V with an encoder that appears to work correctly.
This is the spindle and driver I have:
https://www.automationtechnologiesinc.com/products-page/featured-cnc-products/milling-spindle-motor-and-inverter

Thanks