3 setpoint inversion, 4 value range of the input signal, 5 skip frequency function – Lenze 8400 User Manual
Page 1336: 3 setpoint inversion 6, 4 value range of the input signal 6, 5 skip frequency function 6, 18 function library
18
Function library
18.1
Function blocks | L_NSet_1
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Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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18.1.117.3 Setpoint inversion
The output signal of the JOG function is led via an inverter.
The sign of the setpoint changes if bNSetInv is set to TRUE.
18.1.117.4 Value range of the input signal
The value range of the input signal can be limited by using the following parameters:
•
: MaxLimit (default setting: +199.99 %)
•
: MinLimit (default setting: -199.99 %)
18.1.117.5 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.