C127 Reverse Display Button Problem

[Merrell31]

I have a C127 dash and have setup several pages using DM and DC. Pages cycle correctly with the green button and the red button works for clearing alarms. I am trying to setup a reverse button to avoid having to cycle through each page if I go past the page I wanted. See attached image. I setup a button on AV4. I can cycle backwards in the page lineup 1 page and the button then stops working and I have to turn the power off then on again to get it work again. I set the button channel to display on the screen and it shows a zero until i click the button and then it goes to a 1 but not back to a zero. I thought maybe I need to add the button into the page condition with some logic (already tried adding different logic inside page conditions) but I cannot figure out if that is right or it is a simple logic problem or I am headed down the wrong path? Any help is appreciated.

Charles

[David Ferguson]

I suspect your problem is the inactive voltage of 0V, and Active of 5V. You probably want to make those something like inactive = 1V, active = 4V. That way it works even if the voltage doesn't quite reach 0V. I suspect if you were to monitor the raw voltage (I think it's Online->Test->View All Inputs or something like that), you will find the AV4 voltage isn't reading 0V when inactive.

[Merrell31]

I changed the button to 1v/4v and it works now. Thanks