Mitsubishi Electric 800 Series Instruction Manual page 256

5.7.11 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.
Pr. Name
31 Frequency jump 1A
H420
32 Frequency jump 1B
H421
33 Frequency jump 2A
H422
34 Frequency jump 2B
H423
35 Frequency jump 3A
H424
36 Frequency jump 3B
H425
552 Frequency jump range
H429
 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.
Frequency jump
Pr.36
Pr.35
Pr.33
Pr.34
Pr.32
Pr.31
Input set frequency (Hz)
• [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.
Pr.34:35 Hz
Pr.33:30 Hz
• [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.
Pr.33:35 Hz
Pr.34:30 Hz
Initial value Setting
range
9999 0 to 590 Hz, 1A to 1B, 2A to 2B, 3A to 3B are frequency jumps. (3-point
9999 jump)
9999: Function disabled
9999 0 to 30 Hz Set the jump range for the frequency jumps (6-point jump).
9999 3-point jump
Description
5. PARAMETERS
5.7 (H) Protective function parameter
3
4
5
5
5
6
7
8
9
10
255