EXAMPLE 3:
Variable value= REFERENCE, range= Min ref - Max ref
Range needed for output= Min ref (0%) - Max ref (100%), 0–10 mA
Output signal 0 or 4 mA is needed at Min ref - set par. 6-51
Terminal 42 Output Min Scale
to 0%
Output signal 10 mA is needed at Max ref (100% of range) - set par. 6-52
Terminal 42 Output Max Scale
to 200%
(20 mA / 10 mA x 100%=200%).
14-01 Switching Frequency
Option: Function:
Select the inverter switching frequency. Changing the switching frequency can help to reduce
acoustic noise from the motor.
NOTE!
The output frequency value of the adjustable frequency drive must never exceed
1/10 of the switching frequency. When the motor is running, adjust the switching
frequency in par. 14-01
Switching Frequency
until the motor is as noiseless as
possible. 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
7 How to Program the Adjustable Frequency
Drive
VLT
®
HVAC Drive Instruction Manual
7-32
MG.11.AB.22 - VLT
®
is a registered Danfoss trademark
7
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