F
out
[Hz]
F
max
= 50 Hz
F
off
03.08.2012
v_u_f_dia_fcontr_d_lin.vsd
1
2
3
4
5
6
7
8
9
10
Analog In 1
0
45
50
40
35
30
25
20
15
10
5
2
4
6
8
10
12
14
16
18
20
0...10 V
0...20 mA
10
20
30
40
50
60
70
80
90
100 0...100 % PWM
F
edge
= 48.5 Hz
U
out
100 %
F
on
0.5
1
5
Q
L
U
start
= 10 %
U
start
= 0 %
Uout
Output voltage
Ustart
Start-up voltage
Foff
Shutdown Freq.
Fedge
Edgefrequency
Fmax
Maximum frequency
L
Linear (factory setting)
Q
Square
Startvoltage
Startvoltage
The start voltage is used to apply enough torque to the motors to insure they will run at
low speed.
Attention! In order to prevent over current and unnecessarily high thermal load of the
motor, do not select to high a setting.
Adjustment range: 0 - 25 % (percentage of the maximum output voltage)
Factory setting:
1.10
,
3.10
,
3.20
= 10 %
1.11
,
3.11
,
3.21
= 6 %
VF quadratic
VF quadratic
U/f curve linear or square
Factory setting
“
UF quadratic
”
=
“
OFF
”
i.e linear curve pre-programmed.
In the case of a linear characteristic curve, the motor achieves full torque throughout
the entire speed range. For drive motors, this generally ensures optimum speed
control.
Switching over to square characteristic curve (only permisible in fans and pumps with
square torque moment) might make sense in order to reduce the electromagnetic
motor noises.
“
UF square
”
=
“
ON
”
Operating Instructions
Fcontrol
–
model series FKDM..-C
Programming
L-BAL-E057-GB 1304 Index 009
Part.-No. 00163327-GB
59/74
