SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
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Chapter 4 Explanation of Functions<br />
4.2.21 Jump frequency function<br />
The jump frequency function allows you to operate the inverter so<br />
that it avoids the resonant frequency of the machine driven by the<br />
same.<br />
Since the inverter avoids the motor operation with a constant output<br />
frequency within the specified range of the frequencies to jump when<br />
the jump frequency function is enabled, you cannot set any inverter<br />
output frequency within the specified range of the frequencies to<br />
jump.<br />
Note that, while the inverter is accelerating or decelerating the motor, the inverter output frequency<br />
changes continuously according to the set acceleration/deceleration time.<br />
You can set up to three frequencies to jump.<br />
Item Function code Range of data Description<br />
Jump (center) frequency A063/A065/<br />
Setting of the center frequency of the<br />
0.00 to 400.0 (Hz) (*1)<br />
settings, 1st/2nd/3rd settings A067<br />
frequency range to be jumped<br />
Jump (hysteresis) frequency<br />
A064/A066/<br />
Setting of the half bandwidth of the<br />
width settings, 1st/2nd/3rd<br />
0.00 to 10.00(Hz)<br />
A068<br />
frequency range to be jumped<br />
settings<br />
*1 Setting of 0 Hz disables the jump frequency function.<br />
Output frequency<br />
Related code<br />
A063: Jump (center) frequency setting 1<br />
A064: Jump (hysteresis) frequency width<br />
setting 1<br />
A065: Jump (center) frequency setting 2<br />
A066: Jump (hysteresis) frequency width<br />
setting 2<br />
A067: Jump (center) frequency setting 3<br />
A068: Jump (hysteresis) frequency width<br />
setting 3<br />
A067<br />
A068<br />
A068<br />
A065<br />
A066<br />
A066<br />
A063<br />
A064<br />
A064<br />
4.2.22 Acceleration stop frequency setting<br />
The acceleration stop frequency setting function allows you to make<br />
the inverter wait, upon starting the motor, until the slipping of the<br />
motor becomes less when the load on the motor causes a large<br />
moment of inertia.<br />
Frequency command<br />
Related code<br />
A069: Acceleration stop frequency setting<br />
A070: Acceleration stop time frequency<br />
setting<br />
Use this function if the inverter has tripped because of overcurrent when starting the motor.<br />
This function can operate with every acceleration pattern, regardless of the setting of the acceleration<br />
curve selection (A097).<br />
Item Function code Range of data Description<br />
Acceleration stop frequency<br />
Setting of the frequency at which to<br />
A069 0.00 to 400.0(Hz)<br />
setting<br />
stop acceleration<br />
Acceleration stop time<br />
Setting of the length of time to stop<br />
A070<br />
0.0 to 60.0(s)<br />
frequency setting<br />
acceleration<br />
Output frequency<br />
A069<br />
A070<br />
Frequency command<br />
4 - 25
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