KEB COMBIVERT F5 - Serie Betriebsanleitung Seite 58

Operation of the Unit
GB
S-curve time
GB
Ramp adjustment with S-curves
+f [rpm]
t1
t2
-f [rpm]
GB- 22
Example:
The drive should decelerate from 800 rpm to 300 rpm in 1 s.
∆ ∆ ∆ ∆ ∆ n = 800 rpm - 300 rpm = 500 rpm
∆ ∆ ∆ ∆ ∆ t
= 1 s
∆ t
CP.26 = –––– x 1000 rpm
∆ n
For some applications it is of advantage when the drive starts and stops
jerk-free. This is achieved through a straightening of the acceleration and
deceleration ramps. The straightening time, also called S-curve time, can
be adjusted with CP.27.
Adjustment range:
Resolution:
Factory setting:
In order to drive defined ramps with activated S-curve time,
the acceleration and deceleration times (CP.25 and CP.26)
must be adjusted higher than the S-curve time (CP.27).
t1 t1
t3
1 s
= –––––––– x 1000 rpm = 2 s
500 rpm
0,00 (off)...5,00 s
t2
t1 t1
t1
0,01 s
0,00 s (off)
t1 = S-curve time (CP.27)
t2 = Acceleration time (CP.25)
t3 = Deceleration time (CP.26)
t3
t1 t1
t [s]