Output HVAC stages in OpenStudio DView

edit

Hey folks, Newbie to the OpenStudio/EnergyPlus universe here. So I wanted to look at the different HVAC stages (heating stage1/2, cooling stage1/2) over a simulation window plotted as different traces on DView but I can't find these output variables on OpenStudio.There seems to be a fundamental disconnect between the controls we would expect in a real RTU (relays turning on/off) and what EnergyPlus exposes as outputs. Can someone clarify this and how schedules relate to this problem?

Thanks!