Hello, usually if you wish to do endless rotations with external axes, you have to setup the $AXIS_TYPE parameter to ENDLESS in workvisual.
But BEWARE you also have to check can this KUKA positioner on AXIS 2 do ENDLESS rotations in order that you dont BRAKE any cables by twisting them. According to the datasheet for your positioner you can't do endless motions, but either only +-1800 or +-185 depends if energy supply system is used or not.
In datasheet KP2-SV2600HW is stated that axis 2 motion range is +-1800 degrees without energy supply system, then you must leave parameter to ROTATORY if you didn't make any hardware modifications on axis 2 which would allow to do endless motions.
If energy supply system is used axis 2 can only do +-185 and you can't do more than 1 turn or 370 degrees.
If you have axis without energy supply system according to datasheet, then you can do only max 10 turns according to datasheet(2*1800/360=10) and looking to your picture of the part you want to weld i guess it would be enough to have 10 turns, In that case i would check the software limit switch parameters if they are set to more than +360 in positive direction and less then -360 in negative direction , but change parameters only when you are sure what positioner you have according to datasheet(with or without energy supply system) in order not to brake any cables which may go inside of axis center by twisting them by going beyond 360 degrees.