Trane VarioTrane TR1 2800 Series, Руководство по эксплуатации

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411 Switching frequency
Value:
3000 - 14000 Hz (TR1 2803 - 2875)
4500 Hz
3000 - 10000 Hz (TR1 2880 - 2882)
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.
NOTE:
The output frequency of the frequency converter can
never assume a value higher than 1/10 of the switch-
ing 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.
NOTE:
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,
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:
The parameter must be set to LC-filter connected if an
LC-filter is connected between the adjustable fre-
quency drive and the motor.
Description of choice:
The LC-filter connected [3] must be used 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.
NOTE:
When the LC filter is selected the switching frequency
is changed to 4.5 kHz.
413 Overmodulation f unction
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 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
Value:
-100,000.000 - par. 415 FBMAX
0.000
Function:
Parameter 414 Minimum feedback, FB MIN and 415
Maximum feedback, FB MAX are used to scale the dis-
play 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
Analogue inputs ).
415
Maximum feedback, FBMAX
Value:
FBMIN - 100,000.000
100
Function:
See description of parameter 414 Minimum feedback,
FB MIN .
Description of choice:
Set the value to be shown on the display when the
maximum feedback has been obtained on the selec-
ted feedback input (parameter 308/314
Analogue in-
puts
).
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]
m3 /s (m3/s) [13]
l/min. (l/m) [14]
m3 /min. (m3/min) [15]
l/h (l/h) [16]
m3 /h (m3/h) [17]
Kg/s (kg/s) [18]
Kg/min. (kg/min) [19]
Kg/hour (kg/h) [20]
48 TR1 2800 Series VFD
Programming