Lenze DDS Global Drive PLC Developer Studio - Manual (Page 13)

Function block library LenzeElectricalShaft.lib
Special functions
2.1.1 Digital frequency ramp generator (L_DFRFG)
2−3
L
LenzeElectricalShaft.lib EN 1.2
t
n I n _ v
t
n O u t _ v
n I n _ v
P a t h
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.
t
n I n _ v
n M a x S p e e d
d w T i r d w T i r
b Q S P _ b
t
n O u t _ v
d w T i f F o r Q S P
Abb. 2−4 Diagram of the Quickstop function