Wiring up your C4N controller as follows:

White and Yellow wire up to SP RELAY

Red into + and Black into -

Orange and Green -> tape-off

For configuring your UCcnc software you’ll want to adjust your

Configuration -> Spindle settings to match these:

New VFD's that come with this quickstart guide will already have this configured... but if your quick start guide was "Other"... then you'll want to verify these two VFD Parameters:

P0.0.03 = 1

P2.0.02 = 21

These parameters basically tell the VFD to listen to the White and Yellow wires... and when triggered to activate the forward function.