Adjustment Of The U/F Curve - Helios FU Comfort Sinus Manuel De Montage Et D'utilisation

Installation and Operating Specification FU Comfort Sinus
9.11.3

Adjustment of the U/f curve

Information
The device comes supplied with a preprogrammed square characteristic curve for the operation of
fans.
In the case of voltage-controllable motors and square load torque-moments (e.g. fans and pump
operation), an optimal speed control is generally achieved through this.
In systems in which high dynamics are required, switchover to a linear characteristic must take place.
Generally speaking, if the load characteristic is not known as a definite value, the linear characteristic
should be set. In the case of linear characteristic curves, the motor achieves full torque throughout the
entire speed range. For this, a thermal overload of the motor must be prevented through suitable
measures (complete motor protection through using thermocontact or PTC thermistor-monitoring).
Motor Setup
48.5 Hz
Edgefrequency
Motor Setup
50.0 Hz
Max. Frequency
Motor Setup
5.0 Hz
Shutdown Freq.
Uout Output voltage
Fout: Output frequency
Analog In Speed setting signal (0 - 10 V, 0...20 mA, 0...100 % PWM)
Ustart Startvoltage
Foff Shutdown Freq.
Fon: Switch on Freq.
Fedge Edgefrequency
Fmax Max. Frequency
L linear
Q Square (factory setting)
L-BAL-E304-GB 2004
Edgefrequency
The maximum output voltage is attained during break edge frequency.
Adjustment range: 10.0 - 150.0 Hz
Factory setting: 48.5 Hz
In the case of special settings with "Edge frequency" > "Maximum frequency", due to
higher power losses it is possible that automatic power reduction, "derating", occurs.
Max. Frequency
Above the Edgefrequency, the frequency is merely increased up to the Maximum
frequency.
Adjustment range: 10.0 - 150 Hz
Factory setting: 50.0 Hz
Shutdown Freq.
Below the Shutdown Freq. the output is switched off (hysteresis approx. 1.5 % setting
"Max. Frequency") .
Adjustment range: 5.0 - 150 Hz
Factory setting: 5.0 Hz
U
out
100 %
F
off
U = 10 %
start
F
on
U = 0 %
start
5 10 15 20
0
0.5
1 2 3 4
1
2 4 6 8
5 10 20 30 40
Part.-No.
88/139
F
F = 48.5 Hz
edge
L
Q
25
30 35 40 45
50
5 6 7 8 10 0...10 V
9
10 12 14 16 18 20
0...20 mA
50 60 70 80 90 100 0...100 % PWM
Programming
= 50 Hz
max
F [Hz]
out
Analog In 1
26.07.2012
v_u_f_dia_fcontr_d.vsd