Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 23)

DESCRIPTION OF OPERATION 5-5
1557-UM050F-EN-P –June 2013
Skip Speeds
Four skip speeds are provided which may be used to prevent the drive from continuously operating at
certain speeds, usually to avoid exciting mechanical resonance. Each of the four skip speed zones is
defined by two parameters that specify its center point and width. Skip speed zones that overlap are
merged.
After skip speed processing, the speed command input has its sign changed if reverse rotation is
selected, or is set to zero if there is no run request.