Allen-Bradley PowerFlex 70 Reference Manual

2-162 Skip Frequency
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 Figure 2.30
.
This function affects only continuous operation within the band.
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.
If the band is outside the limits,
the skip band is inactive.
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
0 Hz
60 Hz. Max.
Frequency
Skip Frequency 1
400 Hz.
Inactive
Skip Band

Allen-Bradley PowerFlex 70 Specifications

General

Input Voltage	200-240V AC, 380-480V AC, 500-600V AC
Frequency Range	0 - 400 Hz
Humidity	5% to 95% non-condensing
Output Voltage	0 to Input Voltage
Control Methods	Sensorless Vector Control
Communications	Ethernet/IP, DeviceNet, ControlNet
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Ground Fault
Operating Temperature	0°C to 50°C (32°F to 122°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Enclosure Rating	IP20, NEMA Type 1