Hitachi L100 Series Instruction Manual page 88

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
A 67
A 65
A 63
0
"A" Function
Func. Name /
Code SRW Display
A_63, Jump (center) frequency
A_65, setting
A_67
JUMP F1 000.0Hz
JUMP F2 000.0Hz
JUMP F3 000.0Hz
A_64, Jump (hysteresis)
A_66, frequency width setting
A_68
JUMP W1 00.50Hz
JUMP W2 00.50Hz
JUMP W3 00.50Hz
Jump frequencies
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 360.0 Hz
Defines the distance from the
center frequency at which the
jump around occurs
Range is 0.0 to 10.0 Hz
A 66
A 66
A 64
A 64
Frequency command
Run
Mode
–FE
Edit
(CE)
✘
0.0
0.0
0.0
✘
0.5
0.5
0.5
3–17
L100 Inverter
A 68
A 68
Hysteresis values
Defaults
–FU –FR
Units
(UL) (Jpn)
0.0 0.0 Hz
0.0 0.0
0.0 0.0
0.5 0.5 Hz
0.5 0.5
0.5 0.5