Under Element Properties → Operation Link → User Input → Control Operation, the manual lists Invert, Set 0, Set 1 and Reset. Invert toggles a binary value between 0 and 1. Reset sets 1 while pressed and 0 when released.
Do not design a control around assumed Invert behavior for 170, 85 or another multistate code. To send a specific state, use a constant in Set Operation or a text/value mapping in Combo Box, and validate the value accepted by the device. The manual does not define a universal Invert result for nonbinary values.