For most, if not all, VV/VW devices the / is an OR not AND. When you are in VV mode you can set the volts the
device will produce and when you are in VW mode you set the watts you want and the
device measures the resistance of the atty, does a little Ohm's law calculation, and decides what voltage to use.
These are usually two different functions and making changes in one mode has no effect on the other mode.
Some devices forget when you change
batteries and go back to a default and some remember.
So whatever you do in one mode will not effect the other mode.