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 learn the distance as this will also
consider the internal delays of the controller. These delays will result in a lower value for
the slowdown distance than that measured with a tape measure.
Subtract at least 6-8 inches from 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 profile in parameters
LS23, LS24, LS25 to achieve a lower value.
Now it is possible to learn the slow down distance.
1. Move the car on inspection to a floor 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-floor) 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, 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
distance should be learned for both a High Speed and Short Floor runs.
6. To verify distance, set the display to the Home screen. Place a call up or down for a
one floor run. The Inverter Status should show Positioning Active while the car
runs to the floor all the way down to leveling speed, indicating the positioning is
functioning normally. Slowdown can be adjusted using parameters LP03 High
Speed Slowdown Distance or LP04 Short Floor Slowdown Distance. Additionally,
the profile 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.
7. If the Inverter Status or Fault Log
attempt to increase the deceleration and jerks to prevent overshooting the floor. If
the car under or overshoots the floor, the position is not accessible. Increase the
rate of deceleration and/or jerk and then relearn the position. If this still does not
resolve the problem, it may be necessary to move the slowdown point further away
from the floor.
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