Lenze DDS Global Drive PLC Developer Studio Manual de usuario descargar pdf (Pagina 13)

Function block library LenzeElectricalShaft.lib

Special functions

2.1.1 Digital frequency ramp generator (L_DFRFG)

2−3

LenzeElectricalShaft.lib EN 1.2

n I n _ v

n O u t _ v

n I n _ v

P a t h

Abb. 2−3 Speed−time diagram for L_DFRFG

The number of increments at nIn_v (master drive) define the target point. The target can be

represented as a distance. In the speed−time diagram, the distance covered (phase) is shown as the

area under the speed profile. When synchronization is reached, master and slave have covered the

same distance (phase).

2.1.1.2 Quickstop

Removes the drive from the network and brakes it to standstill.

· Quickstop is activated with bQSP_b = TRUE

· Select the constant FIXED0% (selection number 1000) using dwTifForQSP to set the

ramp−down time (1000 º 1 s).

· The set phase−angle detected at nIn_v is saved (16384 º 15000 rpm).

· After reset of the Quickstop request, the set phase is approached via the profile generator.

n I n _ v

n M a x S p e e d

d w T i r

b Q S P _ b

n O u t _ v

d w T i f F o r Q S P

Abb. 2−4 Diagram of the Quickstop function

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 44 45

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Lenze DDS Global Drive PLC Developer Studio Manual de usuario Pagina 13