Hitachi SJ700-2 instruction manual Jump frequency function, Acceleration stop frequency setting

Frequency command

Related code

A069: Acceleration stop frequency setting

A070: Acceleration stop time frequency setting

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

Chapter 4 Explanation of Functions

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	A063/A065/	0.00 to 400.0 (Hz) (*1)	Setting of the center frequency of the
settings, 1st/2nd/3rd settings	A067		frequency range to be jumped
Jump (hysteresis) frequency	A064/A066/		Setting of the half bandwidth of the
width settings, 1st/2nd/3rd		0.00 to 10.00(Hz)
	A068		frequency range to be jumped
settings

*1 Setting of 0 Hz disables the jump frequency function.

Output frequency

A067

A065

A066

A066

A068

A068

A063

A064

A064

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	A069	0.00 to 400.0(Hz)	Setting of the frequency at which to
setting			stop acceleration
Acceleration stop time	A070	0.0 to 60.0(s)	Setting of the length of time to stop
frequency setting			acceleration

Output frequency

A069

A070

Frequency command

4 - 25