Patent ID: 7737653
Filing Date: 2010-06-15
Classification: E06B,G05B

Abstract:
1. A method of controlling a motorized window treatment in response to a command, the motorized window treatment driven by an electronic drive unit having a motor, a controller, and a memory, the controller operable to determine the rotational position of the motor, the method comprising the steps of: storing the command in the memory; adjusting a present position of the motorized window treatment in response to the rotational position of the motor; storing the present position of the motorized window treatment in the memory each time the rotational position of the motor has changed by a predetermined angle, such that a plurality of positions are stored in the memory; recalling the command from the memory when the controller is reset; examining the plurality of positions stored in the memory to locate a discontinuity in the plurality of positions when the controller is reset; determining the present position of the motorized window treatment in response to locating the discontinuity in the plurality of positions; and automatically driving the motor in response to the command and the present position after the command has been recalled from the memory and the present position of the motorized window treatment has been determined.