5 skip frequency function, Skip frequency function, 17 function library – Lenze E84DSxxx User Manual

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17

Function library

17.1

Function blocks | L_NSet_1

754

Lenze · 8400 protec StateLine · Reference manual · DMS 4.2 EN · 03/2013 · TD05

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17.1.26.5 Skip frequency function

If the speed setpoints in speed-variable drives are linearly increasing, for instance, the

frequency/speed range is divided into a number of equal time segments. Therefore, there may be

speeds during acceleration time which must be bridged very fast (e.g. natural resonant frequencies).
The skip frequency function offers the opportunity to select a range in which the initial speed is

maintained. If the speed setpoint leaves that range, the drive will be accelerated to reach the

desired speed.

Note!

• Skip frequencies only affect main setpoints.
• It is not possible to exclude "0" speed if there is a sign reversal of the speed setpoint.

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