Rockwell Automation 1336E IMPACT Adjustable Frequency AC Drive User Manual V 1-4.XX - Manual (Page 346)

B-8 Control Block Diagrams
Acceleration and deceleration are relative terms. Acceleration refers
to a change in speed away from 0 rpm, and deceleration is a change in
speed towards 0 rpm. For example, the acceleration time could be
used to get the speed more negative:
You can use Accel Time 1 (parameter 42) and Accel Time 2
(parameter 43) to change the acceleration ramp and Decel Time 1
(parameter 44) and Decel Time 2 (parameter 45) to change the
deceleration ramp.
You can use S-Curve Percent (parameter 47) to control the level of
filtering that is applied to the acceleration and deceleration ramps.
Speed
Time
Constant Speed
Accel
Time Decel
Time
acceleration deceleration
0
0
Reverse Direction
file: Control
group: Accel/Decel
If your system does not have a brake, the bus regulator limits Decel
Time 1 to prevent a bus overvoltage situation from occurring.
Accel Time 2 and Decel Time 2 are only available if you have an
L Option board and you have set L Option Mode (parameter 116) to
4, 11, or 14.
If S-Curve Percent is
set to:
Then:
0%
No S-curve is used.
10%
The S-curve is applied to 10% of the ramp time.
Speed
Time (in seconds)
0
0
Ramp Out
Speed
Time (in seconds)
0
0
Ramp Out