User`s manual

6-28
6
 Operation Avoiding Resonance (Jump Frequency Function)
The jump frequency function allows the prohibition or “jumping” of certain frequencies within the Inverter’s
output frequency range so that the machine can operate without oscillations caused by resonant frequencies of
the machine.
It can also be used for deadband control.
During acceleration and deceleration the output frequency goes linear through the prohibited frequency
ranges, i.e. no output frequency jumps are performed
During constant speed operation an operation within the jump frequency range is prohibited.
Related Parameters
The relationship between the output frequency and the jump frequency reference is shown in Fig 6.34.
Fig 6.34 Jump Frequency
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
d3-01Jump frequency 1 0.0 HzNo AAAA
d3-02Jump frequency 2 0.0 HzNo AAAA
d3-03Jump frequency 3 0.0 HzNo AAAA
d3-04Jump frequency width 1.0 HzNo AAAA
Output frequency
Frequency reference descending
Jump frequency
width d3-04
Jump frequency reference
Frequency reference ascending
Jump frequency
width d3-04
Jump frequency
width d3-04
Jump
frequency 3
(d3-03)
Jump
frequency 2
(d3-02)
Jump
frequency 1
(d3-01)