IMPULSE•G+ Mini Advanced Instruction Manual – March 2014
5-38
S-Curve Acceleration/Deceleration
An S-Curve pattern is used to reduce shock and provide smooth transitions during machine
acceleration and deceleration. S-Curve characteristic time is the time from the output frequency to
the set accel/decel time. See S-Curve Characteristic timing diagrams below and on the following
page.
Figure 5-23 shows FWD/REV run switching during deceleration to stop. The S-Curve function will
add time to the acceleration and deceleration.
Total time to acceleration from minimum frequency to maximum frequency (total acceleration) is:
Total time to deceleration from maximum frequency to minimum frequency (total deceleration) is:
Parameter
Code Name Function Range Initial Value
Access
Level
D09.01 S-Curve Accel @ Start Sets S-Curve time at Accel
start
0.00–10.0 sec Basic/Adv
D09.02 S-Curve Accel @ End Sets S-Curve time at Accel
end
0.00–10.0 sec Basic/Adv
D09.03 S-Curve Decel @ Start Sets S-Curve time at Decel
start
0.00–10.0 sec Basic/Adv
D09.04 S-Curve Decel @ End Sets S-Curve time at Decel
end
0.00–10.0 sec 0.20 Basic/Adv
*Initial value is determined by X-Press Programming (Table 4.1 to 4.2).
CAUTION
Accel/Decel times will be extended.