Справочник Пользователя для Mitsubishi Electronics FR-A740-0.4k to 500k
158
Limiting the output frequency
4.9.2
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.
parameters allow resonant frequencies to be jumped.
Parameter
Number
Name
Initial Value
Setting Range
Description
31
Frequency jump 1A
9999
0 to 400Hz, 9999
1A to 1B, 2A to 2B, 3A to 3B is
frequency jumps
9999: Function invalid
frequency jumps
9999: Function invalid
32
Frequency jump 1B
9999
0 to 400Hz, 9999
33
Frequency jump 2A
9999
0 to 400Hz, 9999
34
Frequency jump 2B
9999
0 to 400Hz, 9999
35
Frequency jump 3A
9999
0 to 400Hz, 9999
36
Frequency jump 3B
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.
areas.
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.
CAUTION
⋅ During acceleration/deceleration, the running frequency within the set area is valid.
Pr. 31
Frequency jump
Pr. 32
Pr. 33
Pr. 34
Pr. 35
Pr. 36
Set frequency (Hz)
Pr.34:35Hz
Pr.33:30Hz
Pr.33:35Hz
Pr.34:30Hz