KEB COMBIVERT F4-C Manuel D'instruction page 38

DC-braking
GB
Braking time
38
With DC-braking the motor is not decelerated by the ramp. Quick braking
is caused by D.C. voltage, which is applied onto the motor winding. This
parameter determines how the dc-braking is triggered.
Value Activation
0 DC-braking deactivated
1 DC-braking at switch off of the direction of rotation and in
reaching 0Hz. Braking time is dependent on CP.21 or until
the next direction of rotation presetting.
2 DC-braking as soon as the direction of rotation presetting
is absent. Braking time dependent on the real frequency
3 DC-braking, as soon as the direction of rotation changes.
Braking time dependent on the real frequency.
4 DC-braking at switch off of the direction of rotation and the
real frequency goes below 4 Hz.
5 DC-braking, when the real frequency goes below 4 Hz.
6 DC-braking, as soon as the set value goes below 4 Hz.
7 DC-braking, when input I3 (terminal X1.6/Version C) is switched.
Braking time is dependent on the real frequency. At version S
= value "0".
8 DC-braking as long as input I3 (terminal X1.6/Version C) is
switched. At version S same as value "0".
9 DC-braking after switching on the modulation on. Braking
time is dependent on CP.21.
Factory setting:
Note:
Customer adjustment:
The braking time is evaluated depending on CP.20 as follow:
- entered time = braking time
- entered time relates to 100 Hz and decreases/increases
proportionally to the real frequency.
Adjustment range:
Resolution:
Factory setting:
Customer adjustment:
Calculation of the braking time:
t
B
7
Enter-Parameter
_______
0.00...100 s
0.01 s
10 s
_______
CP.21* f
real
=
real
100 Hz
f
100 Hz
f
f ist
real
t
t CP.21
B ist
Breal
t