14-01 Switching Frequency
Option: Function:
Select the inverter switching frequency. Changing the switching frequency can help to reduce
acoustic noise from the motor.
NB!
The output frequency value of the frequency converter must never exceed 1/10
of the switching frequency. When the motor is running, adjust the switching fre-
quency in par. 14-01
Switching Frequency
until the motor is as noiseless as pos-
sible. See also par. 14-00
Switching Pattern
and the section
Derating
.
[0] 1.0 kHz
[1] 1.5 kHz
[2] 2.0 kHz
[3] 2.5 kHz
[4] 3.0 kHz
[5] 3.5 kHz
[6] 4.0 kHz
[7] * 5.0 kHz
[8] 6.0 kHz
[9] 7.0 kHz
[10] 8.0 kHz
[11] 10.0 kHz
[12] 12.0 kHz
[13] 14.0 kHz
[14] 16.0 kHz
20-00 Feedback 1 Source
Option: Function:
Up to three different feedback signals can be used to provide the feedback signal for the frequency
converter’s PID Controller.
This parameter defines which input will be used as the source of the first feedback signal.
Analog input X30/11 and Analog input X30/12 refer to inputs on the optional General Purpose I/O
board.
[0] No function
[1] Analog input 53
[2] * Analog input 54
[3] Pulse input 29
[4] Pulse input 33
[7] Analog input X30/11
[8] Analog input X30/12
[9] Analog Input X42/1
[10] Analog Input X42/3
[11] Analog Input X42/5
[100] Bus feedback 1
[101] Bus feedback 2
[102] Bus feedback 3
[104] Sensorless Flow Requires set up by MCT10 with sensorless specific plug in.
[105] Sensorless Pressure Requires set up by MCT10 with sensorless specific plug in.
6 How to Programme the Low Harmonic Drive
VLT HVAC Low Harmonic Drive Operating In-
structions
110 MG.16.A1.02 - VLT
®
is a registered Danfoss trademark
6
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