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Download Reference Manual 70 & 700 Adjustable Frequency AC Drive
Transcript
2-162 Skip Frequency Skip Frequency Examples The skip frequency will have hysteresis so the output does not toggle between high and low values. Three distinct bands can be programmed. If none of the skip bands touch or overlap, each band has its own high/low limit. Max. Frequency Skip Frequency 1 Skip Band 1 Skip Frequency 2 Skip Band 2 0 Hz If skip bands overlap or touch, the center frequency is recalculated based on the highest and lowest band values. 400 Hz. Skip Frequency 1 Skip Frequency 2 Adjusted Skip Band w/Recalculated Skip Frequency 0 Hz If a skip band(s) extend beyond the max frequency limits, the highest band value will be clamped at the max frequency limit. The center frequency is recalculated based on the highest and lowest band values. 400 Hz. Max.Frequency Skip Adjusted Skip Band w/Recalculated Skip Frequency 0 Hz If the band is outside the limits, the skip band is inactive. 400 Hz. Skip Frequency 1 Inactive Skip Band 60 Hz. Max. Frequency 0 Hz Acceleration and deceleration are not affected by the skip frequencies. Normal accel/decel will proceed through the band once the commanded frequency is greater than the skip frequency. See (A) & (B) in Figure 2.30. This function affects only continuous operation within the band.
