Final Adjustment
4-18 Manual # 42-02-7223
Profile Parameters
• Initial jerk - defines the transition from zero speed to full acceleration. As Initial jerk
increases, the profile transitions more quickly from starting to maximum acceleration.
Values typically range from 4.0 to 8.0 ft/s
3
(1.219 to 2.438 m/s
3
) with higher values result-
ing in a sharper start.
• Acceleration - determines the maximum acceleration for the profile. Determines the
maximum current delivered by the SCR Drive during acceleration. The maximum value is
typically 4.0 ft/s
2
(1.219 m/s
2
) and the minimum is usually not less than 2.5 ft/s
2
(0.762
m/s
2
). Values higher than 4.0 ft/s
2
(1.219 m/s
2
) are possible but do not yield significant
improvements in performance.
• High roll jerk - is used on short runs where the car is not able to reach High speed before
deceleration must begin. High roll jerk determines how quickly the profile transitions
from maximum to zero acceleration and zero to maximum deceleration. As High roll jerk
increases, the profile transitions more quickly. Lower values provide greater comfort but
are harder to fit into the shortest one-floor-runs. We recommend that you identify the
shortest full height floor and use it when testing parameter values. Typical values range
from a minimum of 4.0 ft/s
3
to a maximum of 8.0 ft/s
3
.
• Low roll jerk - is used on runs where the car is able to reach High speed before decelera-
tion must begin. Low roll jerk determines how quickly the profile transitions from maxi-
mum to zero acceleration (High speed) and zero to maximum deceleration. As Low roll
jerk increases, the profile transitions more quickly. Lower values provide greater comfort.
Typical values range from a minimum of 4.0 ft/s
3
to a maximum of 8.0 ft/s
3
.
• High speed - determines the maximum speed for this profile. For the Standard profile
this is usually contract speed (ft/min).
• Deceleration - determines the maximum deceleration for this profile. The maximum
value is typically 4.0 ft/s
2
and the minimum is usually not less than 2.0 ft/s
2
with more
common values ranging from 2.75 ft/s
2
to 3.75 ft/s
2
(0.838 to 1.143 m/s
2
). The value of
Deceleration is usually slightly less than the value of Acceleration (by 0.25 to 0.5).
• Flare jerk - defines the transition from maximum deceleration to near zero speed or to
Approach deceleration. As Flare jerk increases, the profile transitions more quickly from
maximum deceleration to Approach deceleration. Reduction of this parameter is often
used to reduce the tendency to spot or stall near the end of deceleration, and/or to reduce
any tendency for the deceleration rate, as experienced in the car, to bunch up (increase as
the car approaches the floor). The limiting factor in reducing the value of Flare jerk is
inability to fit the profile into the shortest normal one-floor-run.
• Approach deceleration - determines the deceleration rate for the transition from Flare
jerk to Approach jerk.
• Approach jerk - defines the transition from approach deceleration to Leveling speed. As
Approach jerk increases, the profile transitions more quickly from Approach deceleration
to Leveling speed.
• Leveling speed - determines the speed at which the elevator will level into the floor.
• Leveling distance - determines the stabilized distance the elevator will travel before
arriving at the destination floor.
To Next Page
Loading...
Need help?
General