Rockwell Automation Liqui-Flo DBT Reach Drive - Manual (Page 227)

Application Notes Appendix D-13
Acceleration and deceleration are not affected by the skip frequencies. Normal
accel/decel will proceed through the band once the commanded frequency is greater
than the skip frequency. See (A) & (B) in D.14. This function affects only continuous
operation within the band.
Table D.2 – Skip Frequency Examples
The skip frequency will
have hysteresis so the
output does not toggle
between high and low
values. Three distinct
bands can be programmed.
If none of the skip bands
touch or overlap, each band
has its own high/low limit.
If skip bands overlap or
touch, the center frequency
is recalculated based on
the highest and lowest
band values.
If a skip band(s) extend
beyond the max frequency
limits, the highest band
value will be clamped at the
max frequency limit. The
center frequency is
recalculated based on the
highest and lowest band
values.
0 Hz
Skip Frequency 2
Skip Frequency 1
Max. Frequency
Skip Band 1
Skip Band 2
0 Hz
Skip Frequency 2
Skip Frequency 1
400 Hz.
Adjusted
Skip Band
w/Recalculated
Skip Frequency
0 Hz
Max.Frequency
Skip
400 Hz.
Adjusted
Skip Band
w/Recalculated
Skip Frequency