Matt,
Good to hear you are making progress!
Here is a link to a G2 drive. Close, but might not be exact. Could help with troubleshooting and setup, if someone has messed with the drive parameters along the line. I've recieved emails from Yaskawa distributors and field techs when ever I have requested specific documents on older legacy drives.
There may be some tests you can run from the drive itself to run up the spindle, then find out why the control is not controlling the drive. More bad wires and/or parameters etc.
G2 PDF
DC