Product manual

Programming Your Application
6-8
650 Series AC Drive
Skip Frequencies
Two programmable skip frequencies are available to prevent the drive from operating at
frequencies that cause mechanical resonance in the load.
• Enter the value of the frequency that causes the resonance into the SKIP FREQUENCY
parameter.
• Enter a width for the skip band into the SKIP FREQUENCY BAND parameter.
The drive will then avoid sustained operation within the forbidden band as shown in the diagram.
The skip frequencies are symmetrical and thus work in forward and reverse.
Setting SKIP FREQUENCY or SKIP FREQUENCY BAND to 0 disables the corresponding
band.
Setpoint
Drive
Frequency
Frequency 1 Frequency 2
Skip band
Skip Frequency
Setpoint
Drive
Frequency
Setpoint
Drive
Frequency
Frequency 1
Frequency 2