NOTICE
The switching frequency is reduced automatically as a
function of the load. See Temperature-Dependent
Switching Frequency under Special Conditions.
When LC-filter connected is selected in parameter 412
Variable switching frequency, the minimum switching
frequency is 4.5 kHz.
412 Variable switching frequency
Value:
Without LC-filter (WITHOUT LC-FILTER) [2]
LC-filter connected
(LC-filter connected) [3]
Function:
Set the parameter to
[3] LC-filter connected if an LC-filter is
connected between the adjustable frequency drive and the
motor.
Description of choice:
Select [3] LC-filter connected if an LC-filter is connected
between the adjustable frequency drive and the motor, as
otherwise the adjustable frequency drive cannot protect
the LC-filter.
NOTICE
When the LC filter is selected, the switching frequency is
changed to 4.5 kHz.
413 Overmodulation function
Value:
Off (off) [0]
On (on) [1]
Function:
This parameter allows connection of the overmodulation
function for the output voltage.
Description of choice:
[0] Off 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.
[1] On means that an output voltage can be obtained
which is greater than the mains voltage (up to 5 %).
414
Minimum feedback FB
MIN
Value:
-100,000.000 - par. 415 FB
MAX
0.000
Function:
Parameters 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 in the display as the minimum
feedback signal value on the selected feedback input
(
parameters 308 Terminal 53, analog input voltage/314
Terminal 60, analogue input current).
415
Maximum feedback, FB
MAX
Value:
FB
MIN
- 100,000.000
1500.000
Function:
See description of parameter 414 Minimum feedback, FB
MIN
.
Description of choice:
Set the value to be shown in the display when the
maximum feedback has been obtained on the selected
feedback input (parameters 308 Terminal 53, analog input
voltage/314 Terminal 60, analogue input current).
416
Process units
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 (m3/s) [13]
l/min. (l/m) [14]
m
3
/min. (m3/min) [15]
l/h (l/h) [16]
m
3
/h (m3/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 (ft3/s) [30]
Gal/min. (gal/min) [31]
Ft
3
/min. (Ft3/min) [32]
Gal/h (gal/h) [33]
Ft
3
/h (Ft3/h) [34]
Programming Design Guide
MG27E402 Danfoss A/S © Rev. May/2014 All rights reserved. 93
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