Operation Avoiding Resonance (Jump Frequency Function) - YASKAWA CIMR-G7U Technical Manual

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%.


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
Frequency 1
d3-01
Jump Freq 1
Jump
Frequency 2
d3-02
Jump Freq 2
Jump
Frequency 3
d3-03
Jump Freq 3
Jump
Frequency
Width
d3-04
Jump
Bandwidth
The relationship between the output frequency and the jump frequency reference is as follows:
Frequency reference
10%
Bias
0 V
Description
This parameter allows
programming of up to three
prohibited frequency reference
points for eliminating problems
with resonant vibration of the
motor / machine. This feature
does not actually eliminate the
selected frequency values, but
will accelerate and decelerate the
motor through the prohibited
bandwidth.
This parameter determines the
width of the deadband around
each selected prohibited
frequency reference point. A
setting of "1.0" will result in a
deadband of +/- 1.0Hz..
Adjusting Frequency References
H3-02
Terminal A1 input voltage
10 V
Change
Setting Factory
during
Range Setting
V/f
Operation
0.0Hz No A
0.0
to 0.0Hz No A
400.0
0.0Hz No A
0.0
to 1.0Hz No A
20.0
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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