4 3
KEB COMBIVERT F4-C
10
Name: Basis
20.03.98
CP - Parameter
© KEB Antriebstechnik, 1997
All Rights reserved
Operation
Chapter
Section Page
Date
DC-braking
DC-braking time
f
t
f
ist
CP.21
100 Hz
t
B
ist
At DC-braking the motor is not decelerated by the ramp. The fast stopping is done by
a dc-voltage that is given onto the motor winding. This parameter defines how DC-
braking is triggered.
Value Activation
0 DC-braking switched off
1 DC-braking at taking away direction of rotation and attaining 0 Hz. Braking
time depends on CP.21 or until the next rotation setting.
2 DC-braking as soon as rotation setting is missing. Braking time depends on
the actual frequency.
3 DC-braking as soon as the direction of rotation changes. Braking time
depends on the actual frequency.
4 DC-braking at taking away direction of rotation and when actual frequency
falls below 4 Hz.
5 DC-braking if actual frequency falls below 4 Hz.
6 DC-braking as soon as setpoint value falls below 4 Hz.
7 DC-braking, if input I3 (terminal X1.6) is switched. Braking time depends on
the actual frequency.
8 DC-braking for as long as input I3 (terminal X1.6) is activated.
9 DC-braking after switching on the modulation. Braking time depends on
CP.21.
Factory setting: 7
Remarks: Enter-Parameter
Customer setting: _______
The braking time is evaluated in dependence on CP.20:
- entered time = braking time
- entered time refers to 100 Hz and is reduced/increased in proportion to the
actual frequency
Setting range: 0,00...100 s
Resolution: 0,05 s
Factory setting: 10 s
Customer setting: _______
Calculation of braking time:
t
CP.21 * f
100 Hz
B
ist
ist
=
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