KEB COMBIVERT F5 BASIC - Page 164

6 4
KEB COMBIVERT F5-G / B
14
Name: Basis
06.02.02
© KEB Antriebstechnik, 2002
All rights reserved
Functional Description Set Value and Ramp Adjustment
Chapter Section Page Date
oP.28
t [s]
oP.32 oP.32
oP.30
oP.34 oP.34
oP.33
oP.29
oP.33
oP.35
oP.31
oP.35
70
70
0
For some applications it is of advantage if the drive starts and stops nearly jerk-
free. This function is achieved by straightening the acceleration and deceleration
ramps. The straightening time, also called S-curve time, can be preadjusted with
the parameters oP.32...oP.35. But S-curves are excecuted only with the adjustment
„Ramp with constant rise“.
S-curve time
+f [Hz]
-f [Hz]
Rotation direction
forward
Rotation direction
reverse
Fig. 6.4.6.a S-curve time
oP.28 Acceleration time forward
oP.29*
1
Acceleration time reverse
oP.30 Deceleration time forward
oP.31 *
1
Deceleration time reverse
oP.32 *
2
S-curve time acceleration forward
oP.33 *
1
S-curve time acceleration reverse
oP.34 *
3
S-curve time deceleration forward
oP.35 *
1
S-curve time deceleration reverse
In order to drive defined ramps with activated S-curve time, the preadjusted
acceleration and deceleration times (oP.28...oP.31) must be larger than the
S-curve time (oP.32...oP.34) belonging to it.
At the beginning and the end of the acceleration ramp a parabolic curve is driven for
the time adjusted in parameter oP.32. As a result the adjusted ramp time is exten-
ded by oP.32.
*1 If the value „For“ is adjusted in these parameters (for rotation direction reverse), then the values adjusted in the parameters
for rotation direction forward are valid.
*2 If the value „=Acc“ is adjusted, then the value for acceleration forward (oP.28) is valid.
*3 If the value „=Acc“ is adjusted in parameter oP.34, then the value adjusted in parameter oP.32 is valid for all S-curve times.
Value „0“ switches the corresponding S-curve off.
Total acceleration time = oP.28 + oP.32
Example for acceleration with
rotation direction forward