Is it possible to control the angle of light shelf?

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Hello.

I am studying daylighting technology to reduce lighting energy. While surveying, I found that EnergyPlus can model a light shelf using shading surface.

So, this is my question.

Is it possible to control the angle of shading surface or light shelf?

I made edd file from Example/DaylightingDeviceShelf.idf But there were no variables related to surface angle.

I want to know how to control the angle of surfaces in Energyplus. If you have any idea or knowledge, please let me know.

Thank you.