Rockwell Automation 1333 Drive, 3/4-5HP, 230-575V Series D - Manual (Page 80)

Operation and Programming
Chapter 5
5-37
Parameter 45 -- Skip Frequency Band
Units = Code
Range = 0/10
Factory Setting = 0
Parameter 45 allows each of the individual Skip Frequencies set in
Parameters 42-44 to be expanded into three bands of skip frequencies in
2-20 Hz increments.
Setting a Skip Frequency Band value of 0 will disable the Skip Frequency
Band function, but not individual Skip Frequency values set by Parameters
42-44.
Setting a Skip Frequency Band value other than 0 will enable Skip
Frequency values and expand their range by 2 Hz. For example, if
Parameter 45 is set to 1, a Skip Frequency value set by Parameter 42, 43 or
44 will expand to a band that includes the Skip Frequency value with an
additional 1 Hz band on either side. If set to 10, a Skip Frequency value set
by Parameter 42, 43 or 44 will expand to a band that includes the Skip
Frequency value with an additional 10 Hz band on either side.
Important:
1. If the drive is programmed with a Parameter 3 Frequency Range and/or
Parameter 15 Maximum Frequency value that falls within a skip
frequency bandwidth, the drive will operate only through the non-skip
frequencies below Parameters 3 and 15.
2. If the drive is programmed with a Parameter 51Upper Frequency Clamp
value that falls within a skip frequency bandwidth, the drive will operate
only through the non-skip frequencies below Parameter 51, then jump to
the Parameter 51 value at a maximum speed command.
3. If Parameters 3, 15 and 51 are all within the skip frequency bandwidth,
the drive will operate only though the non-skip frequencies below the
lowest value set by Parameters 3, 15 and 51.