Lenze 8200 Frequency inverters - Manual (Page 170)

Configuration
8200SHB0199 7-33
7.5.9.5 Skip frequencies
Only “HVAC” controllers
Code Name Possible settings IMPORTANT
Lenze Choice Info
C625* Skip frequency 1 480.00 0.00 {0.02 Hz} 480.00
C626* Skip frequency 2 480.00 0.00 {0.02 Hz} 480.00
C627* Skip frequency 3 480.00 0.00 {0.02 Hz} 480.00
C628 Bandwidth of skip
frequencies
0.00 0.00 {0.01 %} 100.00
Function With certain output frequencies, mechanical resonances might occur in the drive (e.g. fan). The skip
frequencies eliminate these unwanted output frequencies. The bandwidth (
af) determines the
range of skip frequencies.
With skip frequency = 480.00 Hz, the function is not active.
The function is within the frequency setpoint range of the ramp function generator.
Adjustment - Set the required skip frequencies under C625, C626, C627.
- C628 defines the bandwidth of skip frequencies.
- Calculate the bandwidth (
Df) for the corresponding skip frequency:
of [Hz]
Skip frequency [Hz] ô
C628 [%]
100 %
Important - The skip frequencies are only effective in the main setpoint channel (see signal flow chart).
- C625, C626, C627, C628 are only stored in parameter set 1.
f skip1 f skip3 f skip2
C625 C626 C627
C628 C628 C628
fd
set1
fd
set2
f f f
FIG 7-3 Skip frequencies and their bandwidth (
a
f)
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