Toshiba VF-AS1 6.12 Jump frequency - jumping resonant frequencies

E6581301

F-22

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If two signals are input simultaneously

• If a clear single and an up or down signal are input simultaneously, priority will b e given to the clear signal.

• If up and down signals are input simultaneously, the frequency will be increased or redu ced by the difference between

the settings of H and H. For example, if the H setting is l arger, the frequency will be increased by

the value obtained by subtracting the setting of H from that of H.

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Setting of the initial motor operated pot mop setting

To adjust the frequency start at a specified frequency other than 0.0 Hz (default initi al frequency) after turning on the

inverter, specify the desired frequency using H (initial motor operated pot mop setting).

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Change of the initial motor operated pot mop setting

To make the inverter automatically save the frequency immediately before it is turned off an d start operation at that

frequency next time power is turned on, set H (change of initial motor operated pot mop setting) to  (which

changes the setting of H when power is turned off).

Keep in mind that the setting of H is changed each time power is tur ned off.

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Frequency adjustment range

The frequency can be set from 0.0 Hz to HJ (Maximum frequency). The lo wer limit frequency will be set as soon as

the set frequency clearing function (function number , ) is entered f rom the input terminal.

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Minimum unit of frequency adjustment

If H (Frequency free unit magnification) is set to , the output frequency can be adjusted in steps of 0.01Hz.

6.12 Jump frequency - jumping resonant frequencies

H

HH

H : Jump frequency 1

H

HH

H : Jumping width 1

H

HH

H : Jump frequency 2

H

HH

H : Jumping width 2

H

HH

H : Jump frequency 3

H

HH

H : Jumping width 3

• Function

Resonance due to the natural frequency of the mechanical system can be avoided by jumping the resonant

frequency during operation. During jumping, hysteresis characteristics with respect to the jump frequency

are given to the motor.

Jumping width 3 (H)

Jumping width 2 (H)

Jumping width 1 (H)Jump frequency 1 (H)

Jump frequency 3 (H)

Jump frequency 2 (H)

Frequency setting signal

Output frequency [Hz]