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Avoiding Mechanical Resonance Points (frequency Jumps) (pr. 31 To Pr. 36, Pr. 552) - Mitsubishi Electric FR-F700PJ Instruction Manual

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Limiting the output frequency
4.5.2

Avoiding mechanical resonance points (frequency jumps) (Pr. 31 to Pr. 36, Pr. 552)

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
Frequency jump
552
range
The above parameters can be set when Pr. 160
.... Specifications differ according to the date assembled. Refer to page 346 to check the SERIAL number.
(1)
Frequency jump (3-point jump) (Pr.31 to Pr.36)
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
(2)
Frequency jump (6-point jump) (Pr.552)
Pr.36
Pr.35
Pr.33
Pr.34
Pr.32
Pr.552
Pr.31
Pr.552
0
Input set frequency
REMARKS
 During acceleration/deceleration, the running frequency within the set area is valid.
 If the setting ranges of individual groups (1A and 1B, 2A and 2B, 3A and 3B) overlap, Er1 (write disable error) will occur.
 Setting Pr.552 = "0" disables frequency jumps.
102
Initial Value
9999
9999
9999
9999
9999
9999
9999
Extended function display selection
Example 1
To fix the frequency to 30Hz in the range of 30Hz to 35Hz, set 35Hz in Pr. 34
and 30Hz in Pr. 33.
Example 2
To jump the frequency to 35Hz in the range of 30Hz to 35Hz, set 35Hz in Pr.
33 and 30Hz in Pr. 34.
Jump range
Jump range
Setting Range
0 to 400Hz, 9999
0 to 400Hz, 9999
1A to 1B, 2A to 2B, 3A to 3B are frequency jumps
0 to 400Hz, 9999
(3-point jump)
0 to 400Hz, 9999
9999: Function invalid
0 to 400Hz, 9999
0 to 400Hz, 9999
Jump range for the frequency jump (6-point jump).
0 to 30Hz, 9999
9999: 3-point jump
=
"
0
"
. (Refer to page 197)
 Up to three areas may be set, with the jump frequencies set to
either the top or bottom point of each area.
 The value set to 1A, 2A or 3A is a jump point, and operation in
the jump zone is performed at these frequencies.
 The total of six jump areas can be set by setting the
common jump range for the frequencies set in Pr.31 to
Pr.36.
 When frequency jump ranges overlap, the lower limit of
the lower jump range and the upper limit of the upper
jump range are used.
 When a frequency is set to a point within a jump range,
the set frequency is lowered or increased to the jump
range limits, according to the following frequency input
condition.
Frequency input
condition
The setting frequency is decreased to
When accelerating
the lower limit of the jump range.
The setting frequency is increased to
When decelerating
the upper limit of the jump range.
Description
Set frequency after
frequency jump

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