Operation Avoiding Resonance (Jump Frequency Function) - YASKAWA Varispeed E7 Instruction Manual And Parameter Description

Operation Avoiding Resonance (Jump Frequency Function)

This function allows the prohibition or "jumping" of certain frequencies within the Inverter's output fre-
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quency range so that the motor can operate without resonant oscillations caused by some machine systems.
It can also be used for deadband control.
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Related Constants
Con-
stant
Number
d3-01 Jump frequency 1
d3-02 Jump frequency 2
d3-03 Jump frequency 3
d3-04 Jump frequency width
The relationship between the output frequency and the jump frequency reference is as follows:
Setting Precautions
Set the jump frequencies according to the following formula: d3-01 ≥ d3-02 ≥ d3-03.
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When constants d3-01 to d3-03 are set to 0 Hz, the jump frequency function is disabled.
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Name
Set the frequency center value of the jump frequency set-
tings, in hertz.
Set to 0.0 to disable the jump frequency function.
Make sure that the settings are as follows: d3-01 ≥ d3-02 ≥
d3-03.
Operation within the jump frequency range is prohibited.
Changes during acceleration and deceleration are made
gradually without performing jumps.
Sets the jump frequency width in hertz.
The jump frequency range is as follows: (Jump frequency
±d3-04).
Output
frequency
Frequency reference descending
Jump
frequency
width d3-04
Jump
frequency
3 (d3-03)
Fig 6.23 Jump Frequency
Description
Jump frequency width d3-04
Frequency
reference
ascending
Jump
frequency
width d3-04
Jump Jump
frequency frequency
2 (d3-02) 1 (d3-01)
Change
Setting Factory during Access
Range Setting Opera- Level
tion
0.0 Hz No A
0.0 to
0.0 Hz No A
200.0
0.0 Hz No A
0.0 to
1.0 Hz No A
20.0
Jump frequency reference