Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual page 406

Fr-f700p series
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2
Frequency jump (6-point jump) (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.
Pr.
Name
31
Frequency jump 1A
32
Frequency jump 1B
33
Frequency jump 2A
34
Frequency jump 2B
35
Frequency jump 3A
36
Frequency jump 3B
552
Frequency jump range
The above parameters can be set when Pr.160 User group read selection = "0".
(
Refer to Chapter 4 of the Instruction Manual (Applied) )
(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
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.
Initial value
9999
9999
9999
9999
9999
9999
9999
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
Input set frequency
Setting range
0 to 400Hz, 9999
0 to 400Hz, 9999
1A to 1B, 2A to 2B, 3A to 3B are frequency
0 to 400Hz, 9999
jumps (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
0 to 30Hz, 9999
jump).
9999: 3-point jump
 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
When accelerating
When decelerating
7/8
Description
Set frequency after
frequency jump
The setting frequency is decreased to
the lower limit of the jump range.
The setting frequency is increased to
the upper limit of the jump range.
BCN-C22005-639

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