KEB COMBIVERT F5-A, Applications Manual, Page: 159 / 552

Setpoint, rotation- and ramp setting
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 7.4 - 19
7
7.4.8.2.2 S-curve times
For some applications it is of advantage when the drive starts and stops jerk-free. This function
is achieved through a straightening of the acceleration and deceleration ramps.
Parameters oP.32 „s-curve time acc. for.“ to oP.35 „s-curve time dec. rev.“, and oP.70 „s-curve up time acc.for.“
to oP.73 „s-curve up time dec. rev.“ define the time for acceleration from 0 to the maximum value and decele
-
ration from the maximum value to 0.
The maximum value for acceleration / deceleration is defined by the linear ramp times oP.28... oP.31.
Figure 7.4.7.a S-curve time
oP.28
t [s]
oP.32 oP.70
oP.30
oP.72 oP.34
oP.33
oP.29
oP.71
oP.73
oP.31
oP.35
-1000
1000
0
+n [rpm]
-n [rpm]
Rotation direction
forward
Rotation direction
reverse
Definition of the s-curves (straightening time):
Parameter Value range Factory setting Notice
oP.32: S-curve time accele-
ration forward
0: off X
0.01 s...5 s
oP.33: S-curve time accele-
ration reverse
-1: see forward X = oP.32
0: off
0.01 s...5 s
oP.34: S-curve time decele-
ration forward
-1: see acceleration X = oP.32
0: off
0.01 s...5 s
oP.35: S-curve time decele-
ration reverse
-1: see forward X = oP.34
0: off
0.01 s...5 s
oP.70: s-curve up time acc.
for.
-1: lower s-curve X = oP.32
0: off
0.01 s...5 s
further on next side