Pinning Cloth.

Hello. Many times I have made cloth dropping and colliding. I have also pinning the cloth. (But only from frame one)

This time I need the cloth to start dropping above the camera from frame 1. When I see the cloth dropping inside the camera at frame 10 the pinning stop cloth dropping, but I don’t know how to do that.
Do you know how i can delay the pinning to akt first on frame 10. Let me know.
Thanks in advance.