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Shutdown Freq.
Shutdown Freq.
Below the Shutdown Freq. the output is switched off.
Adjustment range: 5.0 - 150 Hz
Factory setting: 10.0 Hz
[V]
[Hz]
L
Q
Fmax
Fedge
Foff
Ustart
Uout
16.05.2007
v_u_f_kennlinie.vsd
Uout
Output voltage
Ustart
Start-up voltage
Foff
Shutdown Freq.
Fedge
Edgefrequency
Fmax
Maximum frequency
L
linear
Q
Square (factory setting)
Startvoltage
Startvoltage
The start voltage is used to apply enough torque to the motors to insure they will run at
low speed.
Caution!
In order to prevent overcurrent 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: 8 %
VF quadratic
VF quadratic
U/f curve linear or square
Factory preprogrammed square characteristic curve
“
UF square
”
=
“
ON
”
for the
operation of voltage controllable fans.
For operation with linear curve
“
UF quadratic
”
=
“
OFF
”
9.12.4
Setting for Rampup time and Rampdown time
By separate menus for Rampup time and Rampdown time an adjustment is possible to individual
system conditions.
This function is switched behind the actual controller function.
Rampup time
Rampup time
Time setting in which the automatic controller output from 0 % to 100 % rises.
Setting range: 0...250 sec.
Factory setting: 10 / 20 / 30 / 40 sec. (depending on device type)
Rampdown time
Rampdown time
Time setting in which the automatic controller output from 100 % to 0 % reduces.
Setting range: 0...250 sec.
Factory setting: 10 / 20 / 30 / 40 sec. (depending on device type)
Operating Instructions
Fcontrol
–
model series FXET4/6/10AMQ
Programming
L-BAL-E079-GB 1706 Index 008
Part.-No.
65/87