How to change value of an EPlus variable using EMS

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Hi,

I am trying to modify the "Server exit air temperature" as calculated by EnergyPlus. Basically EnergyPlus uses a steady-state equation to compute this temperature and I am trying to incorporate a transient scheme using EMS. The variable that I am trying to map for this purpose is "ITE Outlet Dry-Bulb Temperature". I have declared this as an EMS Sensor object and created the variable Taex for this purpose. However, no matter what I do, I cannot access this variable and modify its value using my code. I tried to use an EMS actuator but cannot find a suitable one that will control temperature. How can I accomplish this. Any help would be greatly appreciated.