GF77.20-P-2033TX Tilting/Sliding Roof (SHD) Normalization and Denormalization, Function

GF77.20-P-2033TX Tilting/Sliding Roof (SHD) Normalization And Denormalization, Function
- with CODE (414) Glass electric tilting/sliding roof



Performing normalization
Open tilting roof manually with roof switch (N70s1) until the mechanical stop is reached and continue to press roof switch. The overhead control panel control module (N70) continues to actuate the SR motor (M12m1) and sets the position counter to zero when it has recognized a lock-up of the SR motor for min. 0.5 s. Before reaching the lock-up position at least 3 edges of square wave signal should be recognized by Hall sensor 1, SR (M12b1) and Hall sensor 2, SR (M12b2)

The tilting/sliding roof is now normalized, i.e. the overhead control panel control module can switch off the SR motor before reaching the mechanical stop when opening and closing the tilting/sliding roof automatically.

Normalization must take place when denormalization was accomplished or occurred previously.The position of the tilting/ sliding roof is not known to the overhead control panel control module when denormalized.

Denormalization occurs when:
^ The power supply is interrupted
^ The tilting/sliding roof exceeds the defined motion range by
25 SR motor rotations
^ One of the two Hall sensor signals fails for 10 edges
^ Two Hall sensor signals are absent for > 160 ms even after tilting/sliding roof is reversed
^ The defined Hall sensor signal sequence is faulty.
^ A defect of the excessive force limitation is recognized

The position of tilting/sliding roof is not known to the overhead control panel control module when denormalized

The tilting/sliding roof can only be moved to the "Open sliding roof" and "Open tilting roof" direction with the roof switch.
Closing is no longer possible with the roof switch, because it cannot definitely identify the direction of the motor rotation. To indicate that it is denormalized and to avoid strain on the mechanical limit stop in the "Sliding roof open" position, the drive is actuated in the "Open sliding roof" position for only approx. 0.2 sec. After this it is again necessary to actuate the roof switch

Normalized tilting/sliding roof to restore complete function