Does anyone know of a way to record the damper position of an air-handling unit in OpenStudio or EnergyPlus?

When I look in the *.rdd file, I don't see anything that records damper position for a building's AHU (only zone VAVs).

I've set minimum and maximum values on my economizer trying to fix the damper in a particular position, but it doesn't seem to affect my minimum or maximum OSA %.

Any advice or ideas would be appreciated.