Yaskawa G7 Drive - Manual (Page 244)

Adjusting Frequency References
6-
27
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
The relationship between the output frequency and the jump frequency reference is as follows:
Parameter
Number
Name
Description Setting
Range Factory
Setting
Change
during
Operation
Control Methods
Display V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
d3-01
Jump
Frequency 1
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.
0.0
to
400.0
0.0Hz No A A A A A
Jump Freq 1
d3-02
Jump
Frequency 2
0.0Hz No A A A A A
Jump Freq 2
d3-03
Jump
Frequency 3
0.0Hz No A A A A A
Jump Freq 3
d3-04
Jump
Frequency
Width 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..
0.0
to
20.0
1.0Hz No A A A A A
Jump
Bandwidth
Terminal A1 input voltage
Frequency reference
H3-02
10%
Bias
0 V 10 V