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KFU 2-/4-
133
13 Reference
Values
The KFU 2-/4- series frequency inverters can be configured specific to the application
and enable customer-specific adaptation of the module hardware and software struc-
ture.
13.1 Frequency
Limits
The output frequency of the frequency inverter and thus the speed setting range are
defined by the parameters
Minimum frequency
418
and
Maximum frequency
419
.
The corresponding control methods use the two limit values for scaling and calculat-
ing the frequency.
Parameter
Settings
No. Description
Min.
Max.
Fact.
sett.
3.50 Hz
1)
418 Minimum Frequency
0.00 Hz
999.99 Hz
0.00 Hz
2)
419 Maximum Frequency
0.00 Hz
999.99 Hz
50.00 Hz
The factory setting is dependent on the adjustment of parameter
Configuration
30
:
1)
3.5 Hz in configurations 1xx, 4xx
2)
0.00 Hz in configurations 2xx, 5xx
13.2 Slip
Frequency
The torque-forming current component and thus the slip frequency of the 3-phase
machine depend on the required torque in the case of the field-oriented control
methods. The field-oriented control method also includes the parameter
Slip fre-
quency
719
to limit the torque in the calculation of the machine model. The rated
slip calculated from the rated motor parameters is limited in accordance with the
Slip
frequency
719
which is parameterized as a percentage.
Parameter
Settings
No. Description
Min.
Max.
Fact.
sett.
719 Slip Frequency
0 %
10000 %
330 %
13.3
Percentage Value Limits
The setting range of the percentages is defined by the parameters
Minimum refer-
ence percentage
518
and
Maximum reference percentage
519
. The relevant control
methods use the two limit values for scaling and calculating the frequency.
Parameter
Settings
No. Description
Min.
Max.
Fact.
sett.
518 Minimum Reference Percentage
0.00 %
300.00 %
0.00 %
519 Maximum Reference Percentage
0.00 %
300.00 %
100.00 %