Stall Detection

A seat adjustment motor is deemed to have stalled if there is no change in the input from the feedback sensor of the motor for 200 ms. In case of stall detection the drive to that motor is cancelled for the remainder of the memory recall operation or until the switch is re-selected. The motor may be activated again to move past the stall position, by pressing the appropriate switch for more than 2 seconds. If sensor feedback is detected, then the motor will continue to be driven until the switch is released. If sensor feedback is not detected, then the motor is only driven for 0.5 second and then stops until the switch is released and pressed again. Then a further 0.5 second of activation is permitted. This is known as inch mode, which allows seat adjustment to be maintained if sensor feedback is lost.