34
Figure 3.2 elevator ride sequence when d1-18=2
Step 3:
Accel/Decel Ramp and Jerk Settings
Acceleration and deceleration ramps are set using the C1-
**
parameters. Use the C2-
**
parameters
to adjust the jerk at the start of acceleration or deceleration.
The default values set by the drive are recommended. Setting highly fast rates for acceleration and
deceleration ramps could result in over-current and over-voltage fault, respectively. Acceleration
ramp parameters always set the time to accelerate from 0 to the maximum speed. Deceleration ramp
parameters always set the time to decelerate from the maximum speed to 0. C1-01, C1-02, and C1-04
are the default active accel/decel settings in SBT-L450U. In this version (SBT-L450U), C1-01 is used
for all accelerations. C1-02 is used when the motor decelerates from any speed to any other speed
(except nominal and leveling speed to zero speed). C1-04 is used when the motor decelerates from
leveling speed to zero speed. C1-09 is used when the motor decelerates from nominal speed to zero
speed. If C1-04=0, the leveling deceleration ramp will be according to the value set in C1-02. Refer to
the C parameters family part in chapter 2 for further details.
Figure 3.3
explains how accel/decel ride and jerk settings can be used to adjust the ride profile.
Figure 3.3 accel/decel ride and jerk settings
Step 4: Brake Sequence
Figure 3.4 Brake Sequence
Figure 3.4
is divided into time zones.
Table 3.1
explains the sequence in each time zone.
C2-02
(Jerk at
Accel End)
C2-01 (Jerk
at Accel
Start)
C2-03 (Jerk at
Decel Start)
C2-04 (Jerk at
Decel End)
C2-05 (Leveling
Speed)
C1-01 (Accel Ramp 1)
C1-04
(Decel Ramp 2)
C1-02 (Decel
Ramp 1)
