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For example, if H3-02 is 100%, H3-03 is 0%, and terminal A2 is set to 1 V, the frequency reference from
terminal A1 when 0Vis input to A1 will be 10%.
Frequency reference
Bias
Operation Avoiding Resonance (Jump Frequency Function)
The jump frequency function operates the motor while avoiding resonance caused by characteristic frequen-
cies in the machinery.
This function is effective in creating a frequency reference dead band.
During constant-speed operation, operation within the jump frequency range is prohibited. Smooth operation
still used during acceleration and deceleration, i.e., jumps are not performed.
Related Parameters
Name
Parameter
Number
Display
Jump
This parameter allows
Frequency 1
d3-01
programming of up to three
prohibited frequency reference
Jump Freq 1
points for eliminating problems
Jump
with resonant vibration of the
Frequency 2
d3-02
motor / machine. This feature
does not actually eliminate the
Jump Freq 2
selected frequency values, but
Jump
will accelerate and decelerate the
Frequency 3
motor through the prohibited
d3-03
bandwidth.
Jump Freq 3
Jump
This parameter determines the
Frequency
width of the deadband around
Width
each selected prohibited
d3-04
frequency reference point. A
Jump
setting of "1.0" will result in a
Bandwidth
deadband of +/- 1.0Hz..
The relationship between the output frequency and the jump frequency reference is as follows:
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10%
0 V
Setting
Description
Range
400.0
20.0
Adjusting Frequency References
H3-02
Terminal A1 input voltage
10 V
Change
Factory
during
Setting
V/f
Operation
0.0Hz
No
A
0.0
to
0.0Hz
No
A
0.0Hz
No
A
0.0
to
1.0Hz
No
A
Control Methods
Open
Open
V/f
Loop
Flux
Loop
with
Vector
Vector
Vector
PG
1
2
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
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Troubleshooting
