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LP - Positioning Parameters
Learning the Slowdown Distance:
The actual slow down distance can be learned by the drive or it can be entered
manually. However, it is recommended that the drive actually learn the distance
as this will also take into account the internal delays of the controller. These
delays will actually result in a lower value for the slowdown distance than that
actually measured with a tape measure.
First verify that the value in LP02 Minimum Slowdown Distance is at least 6-8
inches lower than the actual slowdown distance as measured in the hoist-
way with a tape measure. This distance reduction accounts for the delay in
the controller. If the LP02 Minimum Slowdown Distance is too high, adjust the
prole in parameters LS23, LS24, LS25 to achieve a lower value. Note: after
changing the prole parameters, the LP02 Minimum Slowdown Distance will
automatically re-calculate.
Now it is possible to learn the slow down distance.
1) Move the car on inspection to a oor in the middle of the hoist-way.
2) Adjust LP01 Position Control = Learn Slowdown.
3) Place a call up or down for a High Speed (if necessary, multi-oor) or Short
Floor run.
4) At the moment the slowdown is crossed, the drive begins measuring the
slowdown distance.
5) Once the car comes to a stop and the drive is disabled, the drive will note
the actual position, subtract a portion and then load the value into parameter
LP03 High Speed Slowdown Distance or LP04 Short Floor Slowdown
Distance, depending on the speed that was selected for the run. At this point
the distance has been learned and LP01 will automatically be set to ‘Posi One
Floor’, activating positioning. The slowdown distance should be learned for
both a High Speed and Short Floor runs.
6) To verify distance, set the display to Home Screen. Place a call up or down
for a 1 oor run. The Inverter Status should show ‘Positioning Active’ while
the car runs to the oor all the way down to leveling speed, indicating the
positioning is functioning normally. Now the LP05 Correction distance can be
manually adjusted to minimize the leveling distance. Additionally the prole
can be further adjusted if needed for ride comfort. Repeat the process for high
speed run adjusting the LP03 High Speed Slowdown distance to adjust the
leveling distance in this case.
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