Skip Bands 2-135
Skip Bands [Skip Freq 1-3]
The skip band function provides three skip bands that the drive will ramp
through but will not continuously run within. The user will be able to set the
skip frequency (center frequency) for each band and the skip band centered
on the skip frequency. The skip band applies to all three skip frequencies.
The skip band function operates as follows.
1. Greater than or equal to the center frequency and less than or equal to the
high value of the band sets the output to the high value of the band. See
grayed area of 'Upper Band' below.
2. Less than the center frequency and greater than or equal to the low value
of the band, sets the output to the low value of the band. See grayed area
of 'Lower Band' below.
3. The skip frequency will have hysteresis so the output does not toggle
between high and low values.
Conditions
If none of the skip bands touch or overlap, each band has its own high/low
limit. See example #1 below.
If skip bands overlap or touch, the center frequency is recalculated based on
the highest and lowest band values. See example #2 below.
Upper Band Lower Band
Hys t.
Frequency
Time
Command Frequency
Skip Band Output
Set Values
Adjusted Values
60 Hz
0 Hz
13.5 Hz
9 Hz
54 Hz
33 Hz
27 Hz
45 Hz
Example #1
Example #2
Example #2
60 Hz
0 Hz
11.25 Hz
54 Hz
30 Hz
45 Hz
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