The answer is no, I too have an RF controlled fan on a PCS switch and I use the PCS for on off and the RF when I need to adjust. With the Fan set on high the PCS can bring light and fan speed control but since both are fed from the same power the speed follows the dim. A lot of the fans have a separate wire for light and you could get separate light and speed but it's PCS X 2.
It's a common problem without any easy solution. Since RF is tightly controlled by the FCC there isn’t likely to be one coming out way soon.
Bill
www.homeautomationnet.com