Rockwell Automation SP600 AC Drive User Manual Version 1.0 - Manual (Page 150)

12-20 SP600 AC Drive User Manual
Sets the center of a frequency band at which the drive will not
operate continuously (also called an avoidance frequency).
Requires that both Skip Frequency 1, 2, or 3, and Skip Frequency
Band (87) be set to a value other than 0.
Determines the bandwidth around a skip frequency (half the band
above and half the band below the skip frequency). This value
applies to all skip frequencies.
If the commanded drive frequency is greater than or equal to the
skip (center) frequency and less than or equal to the high value of
the band (skip plus 1/2 band), the drive will set the output frequency
to the high value of the band. See (A) in figure 12.8.
If the commanded drive frequency is less than the skip (center)
frequency and greater than or equal to the low value of the band
(skip minus 1/2 band), the drive will set the output frequency to the
low value of the band. See (B) in figure 12.8.
84
85
86 Skip Frequency 1
Skip Frequency 2
Skip Frequency 3
Range: -/+400.0 Hz
Default: 0.0 Hz
Access: 2 Path: Speed Command>Spd Mode & Limits
See also: 87
87 Skip Freq Band
Range: 0.0 to 30.0 Hz [0.1 Hz]
Default: 0.0 Hz
Access: 2 Path: Speed Command>Spd Mode & Limits
See also: 84, 85, 86
Figure 12.8 – Skip Freq Band (87)
Frequency
Time
Skip Frequency
Command
Frequency
Drive Output
Frequency
Skip + 1/2 Band
Skip – 1/2 Band
35 Hz
30 Hz
25 Hz
A A
B B