Mitsubishi Electric FR-A800, Instruction Manual

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(H) Protective function parameter Parameters
5 - 312
5.10.10 Avoiding the mechanical resonance points (frequency jump)
When it is desired to avoid resonance attributable to the natural frequency of a mechanical system,
these parameters allow resonant frequencies to be jumped.
3-point frequency jump (Pr. 31 to Pr. 36)
●
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.
Pr. Name
Initial
value
Setting
range
Description
31
H420
Frequency jump 1A
9999
0 to 590 Hz,
9999
1A to 1B, 2A to 2B, 3A to 3B are frequency jumps.
(3-point jump)
9999: Function disabled
32
H421
Frequency jump 1B
33
H422
Frequency jump 2A
34
H423
Frequency jump 2B
35
H424
Frequency jump 3A
36
H425
Frequency jump 3B
552
H429
Frequency jump range 9999
0 to3 (0 Hz)
Set the jump range for the frequency jumps (6-point
jump).
9999 3-point jump
Fig. 5-137:
Definition of the jump areas
I002591E
Example
쑴
Example 1:
To fix the frequency to 30 Hz in the range of 30 Hz to 35 Hz, set 35 Hz in Pr. 34 and 30 Hz in Pr. 33.
쑶
Example
쑴
Example 2:
To jump the frequency to 35 Hz in the range of 30 Hz to 35 Hz, set 35 Hz in Pr. 33 and 30 Hz in Pr. 34.
쑶
Input set frequency (Hz)
Frequency jump
Se
t f
re
q
u
e
n
c
y
a
ft
e
r
fr
equenc
y jump (H
z)
Pr. 36
Pr. 35
Pr. 33
Pr. 34
Pr. 32
Pr. 31
Pr. 34: 35 Hz
Pr. 33: 30 Hz
Pr. 33: 35 Hz
Pr. 34: 30 Hz