Stretch Wrapper

Im having an issue with a stretch wrapper. The 4-20 ma signal that controls the Vfd speed will randomly change polarity from - to + in the plc program. This makes the stretch wrap feed too slow and it keeps ripping.

your post says 4-20 ma, but the plc program descriptions says 0-10 volt.
i would check all wire connections and wire ends for loose wires / wire breakage.
also, is this a 2 station wrapper? there might be a right / left side switch on the unit that may have dirty contacts.
james

It is a Orbital Wrapper that has 2 stretch wrap stations on it. I think I am going to replace the wiring like you suggested.