![Küenle KFU 2 Series Manual Download Page 153](http://html.mh-extra.com/html/kuenle/kfu-2-series/kfu-2-series_manual_2009350153.webp)
KFU 2-/4-
152
14.1.1.2 Scaling
The analog input signal is mapped to the freely configurable characteristic. The max-
imum admissible setting range of the drive can be set via the frequency limits or per-
centage limits according to the configuration selected. In the case of the parameteri-
zation of a bipolar characteristic, the set minimum and maximum limits for both di-
rections of rotation are effective. The percentage values of the characteristic points
are relative to the limits selected.
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 settings depend on the setup of parameter
Configuration
30
:
1)
3.50 Hz in configurations 1xx, 4xx
2)
0.00 Hz in configurations 2xx, 5xx
The control system uses the maximum value of the output frequency, which is calcu-
lated from the
Maximum Frequency
419
and the compensated slip of the drive. The
frequency limits define the speed range of the drive, and the percentage values sup-
plement the scaling of the analog input characteristic in accordance with the functions
configured.
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 %
14.1.1.3 Tolerance
Band and Hysteresis
The analog input characteristic with change of sign of the reference value can be
adapted by the parameter
Tolerance band
450
of the application. The adjustable
tolerance band extends the zero passage of the speed relative to the analog control
signal. The parameter value (percent) is relative to the maximum current or voltage
signal.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
450 Tolerance band
0.00 %
25.00 %
2.00 %
pos. maximum value
neg. maximum value
(X1 / Y1)
0V
(0mA)
+10V
(+20mA)
(X2 / Y2)
Without tolerance band
pos. maximum value
neg. maximum value
(X1 / Y1)
0V
(0mA)
+10V
(+20mA)
(X2 / Y2)
zero point
tolerance band
With tolerance band