I agree that it looks like cwal61 method would be the way to go here. Relatively simple to setup in the logic of the controller. No messing with parameters and you can do it all with one display. You still use your buttons for entering zone and station and you then hit your Goto button. The concept is that you have "display tags" in your PLC that the PV is always looking at. Rather than changing which tags the PV is showing us using parameters, we would instead change the data in the PLC display tags via logic.
When Zone 1 Station 1 is selected, the logic in the controller copies the actual tags to the "display tags". When another station is selected, we copy their tags to the display tags. It is repetitive logic, but it is easy logic that you can tuck into a subroutine.
OG