Danfoss VLT FCD 311 Design Guide

VLT
®
FCD Series
this may help to minimise possible acoustic noise
from the motor.
NB!:
The output frequency of the frequency con-
verter 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
413 Overmodulation function
(OVERMODULATION)
Value:
Off (OFF)
[0]
✭On (ON)
[1]
Function:
This parameter allows connection of the overmodu-
lation 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 fea-
ture, 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
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:
Set the value to be shown on the display as the min-
imum feedback signal value on the selected
feedback input (parameters 308/314 Analog inputs).
415
415 Maximum feedback, FB
MAX
(MAX. FEEDBACK)
Value:
FB
MIN
- 100,000.000
✭ 1500.000
Function:
See description of parameter 414 Minimum feed-
back, FB
MIN
.
Description of choice:
Set the value to be shown on the display when the
maximum feedback has been obtained on the se-
lected feedback input (parameter 308/314 Analogue
inputs).
416
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]
m/min. (M/MIN)
[26]

F(

F)
[27]
In wg (IN WG)
[28]
gal/s (GAL/S)
[29]
Ft
3
/s (FT
3
/S)
[30]
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.A1.02 - VLT is a registered Danfoss trade mark
84

Danfoss VLT FCD 311 Specifications

General

Brand	Danfoss
Model	VLT FCD 311
Category	DC Drives
Language	English