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Mitsubishi Electric FR-F740-00023 Instruction Manual: Avoiding Mechanical Resonance Points (frequency Jump) (pr. 31 To Pr. 36); Avoiding Mechanical Resonance Points (frequency Jump) (pr. 31 To Pr)

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4.4.2

Avoiding mechanical resonance points (Frequency jump) (Pr. 31 to Pr. 36)

When it is desired to avoid resonance attributable to the natural frequency of a mechanical system, these parameters
allow resonant frequencies to be jumped.
Parameter
Name
Number
31
Frequency jump 1A
32
Frequency jump 1B
33
Frequency jump 2A
34
Frequency jump 2B
35
Frequency jump 3A
36
Frequency jump 3B
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 173)
Frequency jump
Pr.36
Pr.35
Pr.34
Pr.33
Pr.32
Pr.31
Pr.34:35Hz
Pr.33:30Hz
Pr.33:35Hz
Pr.34:30Hz
CAUTION
During acceleration/deceleration, the running frequency within the set area is valid.
Initial Value
9999
9999
9999
9999
9999
9999
Example 1 To fix the frequency to 30Hz in the range 30Hz to 35Hz, set 35Hz in Pr. 34
and 30Hz in Pr. 33.
Example 2 To jump the frequency to 35Hz in the range 30Hz to 35Hz, set 35Hz in Pr.
33 and 30Hz in Pr. 34.
Limiting the output frequency
Setting Range
0 to 400Hz, 9999
0 to 400Hz, 9999
1A to 1B, 2A to 2B, 3A to 3B is
0 to 400Hz, 9999
frequency jumps
0 to 400Hz, 9999
9999: Function invalid
0 to 400Hz, 9999
0 to 400Hz, 9999
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.
Description
77
4

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