Jump Frequency Function (A063 To A068); Acceleration Stop Frequency Setting (A069, A070, A097) - Hitachi SJ700B Series Instruction Manual

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
Jump (center) frequency
settings, 1st/2nd/3rd settings
Jump (hysteresis) frequency
width settings, 1st/2nd/3rd
settings
*1 Setting of 0 Hz disables the jump frequency function.
Output frequency
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
Acceleration stop frequency
setting
Acceleration stop time
frequency setting
Output frequency
Function code
A063/A065/
A067
A064/A066/
A068
A067
A065
A064
A063
A064
Function code
A069
A070
A069
A070
Chapter 4 Explanation of Functions
Range of data
0.00 to 400.0 (Hz) (*1)
0.00 to 10.00(Hz)
A068
A068
A066
A066
Frequency command
Range of data
0.00 to 400.0(Hz)
0.0 to 60.0(s)
Frequency command
4 - 25
Related code
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
Description
Setting of the center frequency of the
frequency range to be jumped
Setting of the half bandwidth of the
frequency range to be jumped
Related code
A069: Acceleration stop frequency setting
A070: Acceleration stop time frequency
setting
Description
Setting of the frequency at which to
stop acceleration
Setting of the length of time to stop
acceleration