Avoid Mechanical Resonance Points (Frequency Jumps) (Pr. 31 To Pr. 36) - Mitsubishi Electric FR-D720-070 Instruction Manual

Limit the output frequency
4.4.2

Avoid mechanical resonance points (frequency jumps) (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.
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
The above parameters can be set when Pr. 160 Extended function display selection
Frequency jump
Pr. 36
Pr. 35
Pr. 34
Pr. 33
Pr. 32
Pr. 31
Example 1
Pr. 34: 35Hz
Pr. 33: 30Hz
Example 2
Pr. 33: 35Hz
Pr. 34: 30Hz
NOTE
During acceleration/deceleration, the running frequency within the set area is valid.
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Initial Value Setting Range
9999 0 to 400Hz, 9999
9999 0 to 400Hz, 9999
1A to 1B, 2A to 2B, 3A to 3B are
9999 0 to 400Hz, 9999
frequency jumps
9999 0 to 400Hz, 9999
9999: Function invalid
9999 0 to 400Hz, 9999
9999 0 to 400Hz, 9999
= " 0 " . (Refer to page 162)
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.
To fix the frequency to 30Hz in the range of 30Hz to 35Hz, set 35Hz in Pr. 34
and 30Hz in Pr. 33.
To jump the frequency to 35Hz in the range of 30Hz to 35Hz, set 35Hz in Pr.
33 and 30Hz in Pr. 34.
Description