Mitsubishi Electric FR-D700 Series, Instruction Manual

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79
Limit the output frequency
4
P
A
RAMETE
R
S
4.4.2 Avoid mechanical resonance points (frequency jumps) (Pr. 31 to Pr. 36)
The above parameters can be set when Pr. 160
Extended function display selection
=
"
0
"
. (Refer to page 157)
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 value set to 1A, 2A or 3A is a jump point and operation in
the jump zone is performed at these frequencies.
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 .
NOTE
During acceleration/deceleration, the running frequency within the set area is valid.
Pr. 31
Pr. 32
Pr. 33
Pr. 34
Pr. 35
Pr. 36
Frequency jump
Set frequency (Hz)
Pr. 34
: 35Hz
Pr. 33
: 30Hz
Pr. 33
: 35Hz
Pr. 34
: 30Hz