It will just be for setting up of new things that you will need the programming I would imagine.
The specs of that motor on eBay make more sense, the 74Amps you mentioned before seemed very high but that one says 7.4A.
It seems likely that you have a resolver but having said that it may still be the case that your motor has an encoder if the part number is not the same, usually its only one letter that is different in the part number.
Hood