Mitsubishi Electric F700, Instruction Manual

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77
Limiting the output frequency
4
PA
R
A
M
E
T
E
R
S
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 173)
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