13
ANTRIEBSTECHNIK
6
4
13
KEB COMBIVERT F4-C
Name: Basis
28.01.98
6
©
KEB Antriebstechnik, 1997
All Rights reserved
Functional Description
Set Value and Ramp Adjustment
Section
Page
Date
Chapter
100
80
0
∆
f
100
50
∆
t
oP.11
∆
f
∆
t
oP.12
∆
t
∆
f
∆
f
oP.13
*
1
∆
t
oP.14
*
1
+f [Hz]
-f [Hz]
Direction of
rotation
cloc
kwise
Direction of
rotation
countercloc
kwise
oP.11
acceleration time
oP.12
deceleration time
oP.13
*
1
acceleration time reverse
oP.14
*
1
deceleration time reverse
∆
f
frequency change
∆
t
acceleration time for
∆
n
Picture 6.4.6.d
Acceleration and deceleration times
*1
If the value „off“ is adjusted in these parameters (acceleration and deceleration times for direction of rotation
reverse), then the values for direction of rotation forward (oP.11 and oP.12) apply.
It is the standard case and the drive is dimensioned for a fixed acceleration respectively
deceleration torque. The ramp times refer to 100Hz (at ud.11 = 0) and change in
proportion to the frequency change. The times to be adjusted are calculated as follows:
desired ramp time
frequency change(
∆
f)
-------------------------------------------------------
=
--------------------------------
ramp time to be adjusted (oP.11...oP.14)
100 Hz
Ramp with constant ascent:
Calculation of acceleration
and deceleration times:
5s x 100Hz
oP.11 =
———————— = 8,33s
(70Hz-10Hz)
10s x 100Hz
oP.12 =
———————— = 20s
(50Hz-0Hz)
100Hz x real ramp time
oP.11...oP14
=----------------------------------
∆
f
A drive shall accelerate from 10Hz to 70Hz in 5s and decelerate from 50Hz to standstill
in 10s. This shall apply to both directions of rotation.
Since these values shall apply to both directions of rotation, oP.13 and oP.14 can
remain in „oFF“.
