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4
12
6
Name: Basis
KEB COMBIVERT F4-F
16.03.99
Functional Description
Set Value and Ramp Adjustment
Chapter
Section
Page
Date
©
KEB Antriebstechnik, 1999
All Rights reserved
SP.11
t [s]
SP.15
SP.15
SP.12
SP.16
SP.16
SP.17
SP.13
SP.17
SP.18
SP.14
SP.18
1000
1000
0
For some applications it is an advantage when the drive starts and stops jerk-free.
This function is achieved through a balancing of the acceleration and deceleration
ramps. The balancing time, S-curve time, is adjusted with the parameters
SP.15...SP.18.
S-curve time
+n [U/min]
-n [U/min]
Rotation
cloc
kwise
Rotation
counter-cloc
kwise
Fig. 6.4.10
S-curve time
SP.11
Acceleration time
SP.12
Deceleration time
SP.13
*
1
Acceleration time counter-clockwise
SP.14
*
1
Deceleration time counter-clockwise
SP.15
S-curve time acceleration
SP.16
*
2
S-curve time deceleration
SP.17
*
1
S-curve time acceleration counter-clockwise
SP.18
*
1
S-curve time deceleration counter-clockwise
In order to drive defined ramps at activated S-curve times the preadjusted acceleration and deceleration
times (SP.11...SP.14) must be larger than the corresponding S-curve times (SP.15...SP.18).
Example for acceleration at rotation clockwise
At the beginning and end of the acceleration ramp a parabolic curve is driven for the time adjusted in parameter SP.15. As
a result the adjusted ramp time is extended by SP.15.
*1
If the value „off“ is adjusted in these parameters (for rotation counter-clockwise), then the values adjusted in the
parameters for rotation clockwise are valid.
*2
If in addition to parameters SP.17 and SP.18 (S-curve time for rotation counter-clockwise) the value „off“ is also
adjusted in parameter SP.16, then the time adjusted in parameter SP.15 is valid for all S-curve times.
Total acceleration time
= acceleration ramp (SP.11) + S-curve time acceleration (SP.15)