QUESTION 1) Is it possible to use USB in this case? If so, is there some example of this or documentation hidden under the table?
Never heard about that! Please tell us if this works!
QUESTION 2) Is there any other possibility how to connect the tool, any ideas?
I am starting working on that offline,
Use COM-port inside cabinet but
you are not able to do 'COM/SERIAL'- communication with Roboguide!
Use ethernet (with socket messaging) if you want to do offline programming.