Well PLC's as well as CNC can have servo controllers, exept that PLC's do not usually have interpolated motion. Is that the one you were enquiring about in an earlier post?
If you cannot find anything about the manuf. or details on the control, probabally the only way is to look at the guts identify what you can and see if you can get something moving and experiment from there. And maybe find out if you can wether it is software driven (e.g.PC based) or has a hardware motion control card of some sort.
Al
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.