KEB COMBIVERT F4-C Applications Manual page 130

Functional Description
S-curve time
Picture 6.4.6.e S-curve time
+f [Hz]
70
0
oP.15 oP.15
oP.11
70
-f [Hz]
*1 If the value „off" is adjusted in these parameters (for direction of rotation reverse) then the adjusted values in the
parameters for direction of rotation forward are valid.
*2 If, in addition to the parameters oP.17 and oP.18 (S-curve time for direction of rotation reverse), the value „off" is
adjusted in parameter oP.16, then the value adjusted in parameter oP.15 is valid for all S-curve times.
In order to drive defined ramps with activated S-curve time, the preadjusted acceleration or deceleration
times (op.11...oP.14) must be longer than the appropriate S-curve times (oP.15...oP.18).
Example for accelerating in direction of rotation forward
At the beginning and the end of an acceleration ramp a parabolic curve is driven for the time adjusted in parameter oP.15.
Therefore the adjusted ramp time is increased by oP.15.
Entire acceleration time = acceleration ramp (oP.11) + S-curve time acceleration (oP.15)
Chapter Section Page
6 4 14
For some applications it is an advantage when the drive starts and stops without
jerks. This is achieved by rounding the acceleration and deceleration ramps. This
rounding time, also called S-curve time, can be adjusted with the parameters
oP.15...oP.18. However, S-curves are performed only with the adjustment „Ramp with
constant ascent".
oP.16
oP.12
Date Name: Basis
KEB COMBIVERT F4-C
28.01.98
Set Value and Ramp Adjustment
oP.11
oP.12
1
oP.13 *
1
oP.14 *
oP.15
oP.16 * 2
1
oP.17 *
1
oP.18 *
oP.13
oP.17 oP.17
oP.16
acceleration time forward
deceleration time forward
acceleration time reverse
deceleration time reverse
S-curve time acceleration forward
S-curve time deceleration forward
S-curve time acceleration reverse
S-curve time deceleration reverse
oP.14
oP.18 oP.18
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