Avoid Mechanical Resonance Points (Frequency Jump) (Pr. 31 To Pr. 36) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Limit the output frequency
4.9.2

Avoid 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.
Parameter
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
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
CAUTION
⋅ During acceleration/deceleration, the running frequency within the set area is valid.
154
Name Initial Value
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.
Setting Range
9999 0 to 400Hz, 9999
9999 0 to 400Hz, 9999
9999 0 to 400Hz, 9999
9999 0 to 400Hz, 9999
9999 0 to 400Hz, 9999
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.
Description
1A to 1B, 2A to 2B, 3A to 3B is
frequency jumps
9999: Function invalid