Hitachi SJ700D-004L, Instruction Manual

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Chapter 4 Explanation of Functions
4-25
4.2.21 Jump frequency function
The jump frequency function allows you to operate the inverter so that it
avoids the resonant frequency of the machine driven by the same.
Since the inverter avoids the motor operation with a constant output
frequency within the specified range of the frequencies to jump when the
jump frequency function is enabled, you cannot set any inverter output
frequency within the specified range of the frequencies to jump.
Note that, while the inverter is accelerating or decelerating the motor,
the inverter output frequency changes continuously according to the set
acceleration/deceleration time.
You can set up to three frequencies to jump.
Item Function code Range of data Description
Jump (center) frequency
settings, 1st/2nd/3rd settings A063/A065/
A067
0.00 to 400.0 (Hz) (*1)
Setting of the center frequency of the
frequency range to be jumped
Jump (hysteresis) frequency
width settings, 1st/2nd/3rd
settings
A064/A066/
A068
0.00 to 10.00(Hz)
Setting of the half bandwidth of the
frequency range to be jumped
*1 Setting of 0 Hz disables the jump frequency function.
4.2.22 Acceleration stop frequency setting
The acceleration stop frequency setting function allows you to make the
inverter wait, upon starting the motor, until the slipping of the motor
becomes less when the load on the motor causes a large moment of
inertia.
Use this function if the inverter has tripped because of overcurrent when starting the motor.
This function can operate with every acceleration pattern, regardless of the setting of the acceleration curve selection
(A097).
Item Function code Range of data Description
Acceleration stop frequency
setting
A069 0.00 to 400.0(Hz)
Setting of the frequency at which to stop
acceleration
Acceleration stop time
frequency setting
A070 0.0 to 60.0(s)
Setting of the length of time to stop
acceleration
A063: Jump (center) frequency setting 1
A064: Jump (hysteresis) frequency width
setting 1
A065: Jump (center) frequency setting 2
A066: Jump (hysteresis) frequency width
setting 2
A067: Jump (center) frequency setting 3
A068: Jump (hysteresis) frequency width
setting 3
Related code
A063
A065
A067
A064
A064
A066
A066
A068
A068
Output frequency
Frequency command
A069: Acceleration stop frequency setting
A070: Acceleration stop time frequency setting
Related code
A070
A069
Output frequency
Frequency command