Hitachi SJ Series, User Manual

Page: 359 / 786

12-16-10
Chapter 12 Inverter Function
12.16.7 Avoiding mechanical resonance of
motor and machine
•
Having been assembled to the system, the motor
vibrates when operated at a constant speed.
•
Use the jump frequency function to operate the
inverter while avoiding resonance points on the
load-machine system.
•
A jump frequency can be set at 3 points.
Parameter
Setting examples
•
The jump frequency function is a function to
prevent output within the specified frequency
command range. When a frequency command
that is within the range of the jump frequency
function is input, the output is automatically limited.
While the output is limited, the LIM icon will be
displayed.
•
The output frequency within the range of the jump
frequency command fluctuates continuously
according to normal the acceleration/deceleration
time.
Item Parameter Data Description
Jump frequency 1 [AG101]
0.00~590.00(Hz)
Sets the center of the frequency range at
which to execute a jump If 0.00 Hz is set,
the jump frequency function is disabled.
Jump frequency 2 [AG103]
Jump frequency 3 [AG105]
Jump frequency
width 1
[AG102]
0.00~10.00(Hz)
Set one-half of the frequency width in which
to execute a jump. Frequencies that fall in
the range of a jump frequency±jump width
will be jumped.
Jump frequency
width 2
[AG104]
Jump frequency
width 3
[AG106]
Q
A
!
Output
frequency
Frequency command
[AG101]
[AG103]
[AG105]
[AG102]
[AG102]
[AG104]
[AG104]
[AG106]
[AG106]