• Note that when Pr.2 is set to any value equal to or higher than Pr.13 Starting frequency, simply turning ON the start
signal runs the motor at the frequency set in Pr.2 even if the command frequency is not given.
Parameters referred to
Pr.125 Terminal 2 frequency setting gain frequency, Pr.126 Terminal 4 frequency setting gain
5.10.10 Avoiding machine resonance points (frequency
When it is desired to avoid resonance attributable to the natural frequency of a mechanical system, these parameters allow
resonant frequencies to be jumped.
Frequency jump 1A
Frequency jump 1B
Frequency jump 2A
Frequency jump 2B
Frequency jump 3A
Frequency jump 3B
Frequency jump range
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
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
6-point frequency jump (Pr.552)
• A total of six jump areas can be set by setting the common jump range for the frequencies set in Pr.31 to Pr.36.
5.10 (H) Protective function parameter
Input set frequency (Hz)
0 to 590 Hz,
1A to 1B, 2A to 2B, 3A to 3B are frequency jumps (3-point jump).
9999: Function disabled
0 to 30 Hz
Set the jump range for the frequency jumps (6-point jump).