Function of Power Window Position Recognition Feature

Recognition Of Direction Rotation:

Recognition of direction rotation
Two Hall sensors, b1 and b2 are located on the motor shaft. They react to the motion of the magnet. The Hall sensors output one square wave pulse each time the motor rotates once.

The corresponding door control modules (N69/1) or (N69/2), (on models 202/210 also N69/3 or N69/4) reads the pulses from the Hall sensors. The door control module uses the chronological offset between the pulses from Hall sensor b1 and Hall sensor b2 to recognize the direction in which the motor is rotating.

Position recognition
The corresponding door control module counts the pulses from the Hall sensor depending on the direction in which the power window motor is rotating. The value in the position counter is increased when the window closes. In the other direction the value in the position counter is reduced as the window opens. The upper lock up position is defined as the zero position, i.e. when the window is all the way up the counter should be at zero. The zero position can be set with the synchronization function. When the zero position is exceeded in the opening direction the counter status is negative.