SceneCaptureComponent2D screenshot

I’m using UE 4.13, in VR mode.
I’m using a SceneCaptureComponent2D and a simple plane to create something like a “camera screen”.

Now, while in the game, i’d like to take a screenshot from the SceneCaptureComponent2D, and automatically save it on the pc.

Which command do i need to implement in the blueprint?

Thanks for the help!