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5. PARAMETERS
5.7 (H) Protective function parameter
3
4
5
5
5
6
7
8
9
10
5.7.11 Avoiding the mechanical resonance points (frequency
jump)
When it is desired to avoid resonance attributable to the natural frequency of a mechanical system, these parameters allow
resonant frequencies to be jumped.
3-point frequency jump (Pr.31 to Pr.36)
• Up to three areas may be set, with the jump frequencies set to either the top or bottom point of each area.
• The settings of frequency jumps 1A, 2A, 3A are jump points, and operation is performed at these frequencies in the jump
areas.
• [Example 1] To fix the frequency to 30 Hz in the range of 30 Hz to 35 Hz, set 35 Hz in Pr.34 and 30 Hz in Pr.33.
• [Example 2] To jump the frequency to 35 Hz in the range of 30 Hz to 35 Hz, set 35 Hz in Pr.33 and 30 Hz in Pr.34.
Pr. Name Initial value Setting
range
Description
31
H420
Frequency jump 1A 9999 0 to 590 Hz,
9999
1A to 1B, 2A to 2B, 3A to 3B are frequency jumps. (3-point
jump)
9999: Function disabled
32
H421
Frequency jump 1B
33
H422
Frequency jump 2A
34
H423
Frequency jump 2B
35
H424
Frequency jump 3A
36
H425
Frequency jump 3B
552
H429
Frequency jump range 9999 0 to 30 Hz Set the jump range for the frequency jumps (6-point jump).
9999 3-point jump
Pr.31
Frequency jump
Pr.32
Pr.34
Pr.33
Pr.35
Pr.36
Set frequency after
frequency jump (Hz)
Input set frequency (Hz)
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