Lenze 8400 - Use of the LCurve3 for Tensile Force Characteristic

Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 1340
17 Function library
17.1 Function blocks | L_Curve_3
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17.1.69.1 Use of the L_Curve_3 for tensile force characteristic
In case of centre winders, the drive torque is transmitted from the centre via the individual layers
up to the winder surface. In case of smooth materials and high diameter areas, it is mostly required
to reduce the tensile force depending on the diameter.
The FB L_Curve_3 can be used to generate a tensile force profile depending on the diameter. For this
purpose, the selection "4: Out = f(characteristic)" has to be set in C01030/1
.
The characteristic is marked by an initial range with constant evaluation (100 %) and a second range
where the tensile force is adapted to the diameter.
The part of the characteristic that depends on the diameter can be generated for a linear tensile
force profile, a linear torque profile or based on a specified characteristic. The respective selection is
made in C01035/1
.
Linear tensile force profile
• nD0_a serves to define at which diameter the tensile force decrease is to start.
C01035/1
(from V12.00.00)
Selection of the tensile force profile
Use of the L_Curve_3 for tensile
force characteristic
0 Linear tensile force profile Lenze setting
1 Linear torque profile
2 Tensile force profile according to
characteristic
Parameters Possible settings Info
Characteristic for a linear tensile force profile (C01035/1 = 1)
Characteristic
 Tensile force
 Diameter
Function for D > D0:
D Current diameter (nDiameter_a)
D0 Initial point for diameter dependency (nD0_a)
HW Tensile force valuation (nCurveCtrl_a)

DMin
(DMax)
100 %

D0
0%
100 %
HW
100 %
nCurveCtrl_a = 50 %
100 %
DD0–
100 % D0–
-----------------------------
– 100 % HW–()⋅