KEB COMBIVERT F5 Series Installation Manualline page 23

CP.22 DC-braking / Mode
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 upon reaching 0Hz.
The braking time is CP.23 or until the next direction of rotation.
2* DC-braking as soon as setting for the direction of rotation is absent.
3* DC-braking as soon as the direction of rotation changes or is absent.
4* DC-braking on disabling the direction of rotation and if the real frequency falls
below 4 Hz.
5* DC-braking when the real frequency falls below 4 Hz and the drive decelerates
6* DC-braking as soon as the set value falls below 4 Hz.
7* DC-braking when input I4 is switched. At control circuit B = value „0".
8 DC-braking as long as input I4 is switched. At control circuit B = value „0".
9 DC-braking after switching on the modulation on.
* Braking time depends on the actual frequency.
CP.24 Max. ramp current
This function protects the frequency inverter against switching off through overcurrent
during the acceleration ramp. When the ramp reaches the adjusted value,it is stopped
so long until the current decreases again. CP.3 displays "LAS" at active function.
CP.25 Max. constant current
This function protects the frequency inverter against switch off through overcurrent during
constant output frequency. When exceeding the adjusted value, the output frequency is
reduced until the value drops below the adjusted value. CP. 3 displays "SSL" at active
function.
CP.26 Speed search condition
When connecting the frequency inverter onto a decelerating motor, an error can be
triggered by the differing rotating field frequencies. With activated speed search the inverter
searches for the actual motor speed, adapts its output frequency and accelerates with
the adjusted ramp to the given set value. During speed search CP.3 displays „SSF". The
parameter determines, under what conditions the functions operate. In case of several
conditions the sum of the value must be entered. Example: CP.26 = 12 means after reset
and after auto-reset UP.
Value Condtion
0 function off
1 at control release
2 at switch on
4 after reset
8 after Auto-Reset UP
GB - 49