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Operating of the unit
Speed search
Voltage stabilization
GB - 28
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 the actual motor speed, adapts its output frequency
and accelerates with the adjusted ramp onto the given set value. During speed
search CP.2 displays "SSF". The parameter determines, under what conditions
the functions operate. With several conditions the sum of the value must be
entered. Example: CP.16 = 12 means after reset and after auto-reset UP
Adjustment range:
Resolution:
Factory setting:
Customer adjustment:
This parameter can adjust a regulated output voltage in relation to the rated
frequency. Because of this voltage variations at the input as well as in the
intermediate circuit only have a small influence on the output voltage (U/f-
characteristic). The function allows, among other things, an adaption of the
output voltage to special motors. In the example below the output voltage is
stabilized onto 230 V (0% boost).
Adjustment range:
Resolution:
Factory setting:
Customer adjustment:
U
/U
N
A
250 V
CP.17 = 230 V
190 V
0...15
Value Condition
1
0
8
1
_______
2
4
8
150...649 V, oFF
1 V
oFF
_______ V
U
at U
= 250V unstabilized
A
N
U
at U
= 250V stabilized
A
N
U
at U
= 190V stabilized
A
N
U
at U
= 190V unstabilized
A
N
U
= mains voltage
N
U
= output voltage
A
CP.5 = 50 Hz
function off
at control release
at switch on
after reset
after Auto-Reset UP
f
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