Jump Frequencies - Hitachi SJ200 Series Instruction Manual

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.
Output
frequency
A067

Jump frequencies

A065
A063
0
"A" Function
Func. Name /
Code SRW Display
A063, Jump (center) frequency
A065, setting
A067
JUMP F1 0000.0Hz
JUMP F2 0000.0Hz
JUMP F3 0000.0Hz
A064, Jump (hysteresis)
A066, frequency width setting
A068
JUMP W1 0000.5Hz
JUMP W2 0000.5Hz
JUMP W3 0000.5Hz
A064
A064
Description
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
SJ200 Inverter
A068
A068
A066
A066 Hysteresis values
Frequency command
Defaults
Run
Mode
–FEF –FU
Edit
(EU) (USA)
0.0 0.0
0.0 0.0
0.0 0.0
0.5 0.5
0.5 0.5
0.5 0.5
3–21
Units
Hz
Hz