Hitachi WJ200 Series

3−29
Jump Frequencies – Some motors or machines exhibit resonances at particular
speed(s), which can be destructive for prolonged running at those speeds. The inverter
has up to three
jump frequencies as shown in the graph. The hysteresis around the
jump frequencies causes the inverter output to skip around the sensitive frequency
values.
“A” Function
Run
Mode
Edit
Defaults
Func.
Code
Name Description Lnitial data Units
A063
A065
A067
Jump freq. (center) 1 to 3 Up to 3 output frequencies can
be defined for the output to
jump past to avoid motor
resonances (center frequency)
Range is 0.0 to 400.0 Hz
Defines the distance from the
center frequency at which the
jump around occurs
Range is 0.0 to 10.0 Hz
U
0.0
0.0
0.0
Hz
A064
A066
A068
Jump freq. width
(hysteresis) 1 to 3
U
0.5
0.5
0.5
Hz
Output
frequency
Frequency
command
A065
A067
A063
A064
A064
A066
A066
A068
A068