Rockwell Automation Liqui-Flo AC GP Vector Drive Version 6.4 - Manual (Page 142)

4-60 LiquiFlo AC Drive, Software Reference Version 6.4
Operating a motor continuously at a particular frequency may cause vibrational
resonance within some machines. Three independent parameter pairs can be
configured for avoidance frequency and frequency band to prevent motor vibration by
preventing the drive output frequency from operating within the selected band(s).
Refer to figure 4.12.
The actual avoidance frequency selection is limited by Minimum Speed (P.003) and
Maximum Speed (P.004). Normal acceleration and deceleration is not affected by this
function.
H.009 Avoidance Frequency Enable
This parameter
enables the
avoidance frequency
bands selected in
H.011, H.013, and
H.015. Parameter Range: OFF = Disable avoidance frequency processing
ON = Enable avoidance frequency processing
Default Setting: OFF
Parameter Type: Tunable
Refer also to parameters: P.003 Minimum Speed
P.004 Maximum Speed
H.010 to H.015 Avoidance Frequency Midpoint and
Band 1, 2, and 3
Figure 4.12 – Avoidance Frequency Band
Max Hz
AF 3
AF 2
AF 1
Avoidance
Frequency Band
Output
Frequency
Speed Reference
Min Max
Min Hz
Base Frequency