If the wind speed is 0 the plane cannot take off as there will be no lift, but a plane doesn't really need it's wheels to generate wind speed or lift. The THRUST of it's propeller or jets and the plane's weight to wing span ratio determines it's minimum lift. If you have a plane that is parked on a runway and you put a big enough fan in front of it, it will "lift" even if it's not moving "forward" on its wheels. If the plane is powerful enough to break the friction barrier of the belt it will fly no matter how fast backwards the belt moves. The only way to keep it down would be to weigh it down enough so that the weight to wing span ratio is off.