VLT
®
FCD Series
Programming, FCD
300
411 Switching frequency
(SWITCH FREQ.)
Value:
3000 - 14000 Hz
✭ 4500 Hz
Function:
The set value determines the switching frequency of the
inverter. If the switching frequency is changed, this may
help to minimise possible acoustic noise from the motor.
NB!:
The output frequency of the frequency converter
can never assume a value higher than 1/10
of the switching frequency.
Description of choice:
When the motor is running, the switching frequency
is adjusted in parameter 411 Switching frequency
until the frequency has been obtained at which
the motor is as low-noise as possible.
NB!:
The switching frequency is reduced
automatically as a function of the load.
See Temperature-Dependent Switching
Frequency under Special Conditions .
413 Overmodulation function
(OVERMODULATION)
Value:
Off (OFF)
[0]
✭On (ON)
[1]
Function:
This parameter allows connection of the
overmodulation function for the output voltage.
Description of choice:
Off [0] means that there is no overmodulation
of the output voltage, which means that torque
ripple on the motor shaft is avoided. This can
be a good feature, e.g. on grinding machines.
On [1] means that an output voltage can be obtained
which is greater than the mains voltage (up to 5 %).
414 Minimum feedback, FB
MIN
(MIN. FEEDBACK)
Value:
-100,000.000 - par. 415 FB
MAX
✭ 0.000
Function:
Parameter 414 Minimum feedback, FB
MIN
and 415
Maximum feedback, FB
MAX
are used to scale the
display text to make it show the feedback signal in a
process unit proportionally to the signal on the input.
Description of choice:
Setthevaluetobeshownonthedisplayasthe
minimum feedback signal value on the selected
feedback input (parameters 308/314 Analogue inputs).
415 Maximum feedback, FB
MAX
(MAX. FEEDBACK)
Value:
FB
MIN
- 100,000.000
✭ 1500.000
Function:
See description of parameter 414 Minimum
feedback, FB
MIN
.
Description of choice:
Setthevaluetobeshownonthedisplaywhenthe
maximum feedback has been obtained on the selected
feedback input (parameter 308/314 Analogue inputs).
416 Process units
(REF/FEEDB. UNIT)
Value:
✭No unit (NO UNIT)
[0]
%(%)
[1]
ppm (PPM)
[2]
rpm (RPM)
[3]
bar (BAR)
[4]
Cycles/min (CYCLE/MI)
[5]
Pulses/s (PULSE/S)
[6]
Units/s (UNITS/S)
[7]
Units/min. (UNITS/MI)
[8]
Units/h (UNITS/H)
[9]
°C (°C)
[10]
Pa (PA)
[11]
l/s (L/S)
[12]
m
3
/s (M
3
/S)
[13]
l/min. (L/M)
[14]
m
3
/min. (M
3
/MIN)
[15]
l/h (L/H)
[16]
m
3
/h (M
3
/H)
[17]
Kg/s (KG/S)
[18]
Kg/min. (KG/MIN)
[19]
Kg/hour (KG/H)
[20]
Tons/min. (T/MIN)
[21]
Tons/hour (T/H)
[22]
Metres (M)
[23]
Nm (NM)
[24]
m/s (M/S)
[25]
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.B7.02 - VLT is a registered Danfoss trademark
67
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