Manual
Table Of Contents
- PowerFlex 700H Adjustable Frequency AC Drive Programming Manual
- Summary of Changes
- Table of Contents
- Preface
- 1 - Drive Start-Up
- 2 - Programming and Parameters
- 3 - Troubleshooting
- Drive Status
- Faults and Alarms
- Manually Clear Faults
- Fault and Alarm Descriptions
- Fault Subcodes
- Clear Alarms
- Common Drive Symptoms and Corrective Actions
- Drive does not Start from Start or Run Inputs Wired to the Terminal Block
- Drive does not Start from HIM
- Drive does not Respond to Changes in Speed Command
- Motor and/or Drive will not Accelerate to Commanded Speed
- Motor Operation is Unstable
- Drive will not Reverse Motor Direction
- Stopping the Drive Results in a Decel Inhibit Fault
- Technical Support Options
- A - HIM Overview
- B - Application Notes
- C - History of Changes
- Index
- Back Cover
98 Rockwell Automation Publication 20C-PM001F-EN-P - March 2012
Appendix B Application Notes
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
320 Hz.
Adjusted
Skip Band
w/Recalculated
Skip Frequency
0 Hz
Max.Frequency
Skip
320 Hz.
Adjusted
Skip Band
w/Recalculated
Skip Frequency
0 Hz
60 Hz. Max.
Frequency
Skip Frequency 1
320 Hz.
Inactive
Skip Band