Mitsubishi Electric 700 Series, Instruction Manual

Page: 99 / 416

88
Limiting the output frequency
4.4.2 Avoiding mechanical resonance points (Frequency jump) (Pr. 31 to Pr. 36)
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 190)
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
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
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.
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