VLT
®
MICRO
Pr.70 Frequency Bandwidth Setting Prevention
Factory Setting d0.00
Units 0.1 Hz
Parameter value d0.1 - d20.0 Hz
This parameter determines the frequency band for a given Skip Frequency. Half of the
Skip Frequency Band is above the Skip Frequency and the other half is below.
Programming this parameter to 0.1 disables all skip frequencies.
Pr.71 PWM Carrier Frequency Select
Factory Setting d15
Units 1 kHz
Parameter value d01 - d18 kHz
This parameter determines the carrier frequency for the "Pulse Width Modulated"
output.
Carrier Electromagnetic Noise leakage Heat
frequency noise current dissipation
1kHz large small small
3kHz
9 kHz
15 kHz
18 kHz small large large
Note: Audible of AC motor can be reduced by using a higher carrier frequency, however
please note that the rated output current of the drive decreases by 0.2A for every 1 kHz
increase in carrier above 16 kHz.
Output frequency
Adjustable range
Speed command
frequency
Frequency to
be jumped
Skip frequency
set point
Decelerating
Accelerating
0
Pr.67
Pr.68
Pr.69
Pr.70
Pr.70
51
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