I'm also on the same boat. Have you succeed to build Fanuc test system. I'm also looking to build a test rig for Fanuc servo/spindle amplifier. I just need to run motor in both direction and want to make sure there is no alarm in drives. So what would be minimum hardware will I need? to test fanuc drives. Can I test without Fanuc controller? Or can I use PLC instead of Fanuc controller?