Lenze 8400 - Manual (Page 1250)

18 Function library
18.1 Function blocks | L_Curve_3
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Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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Linear torque characteristic
• nD0_a serves to define at which diameter the tensile force decrease is to start.
• Since in this characteristic selection, the linear torque profile is in the focus, define in this case
the slope of the torque curve via dnCurveCtrl_n:
• When nCurveCtrl_a = 100 %, the tensile force remains unchanged.
• When nCurveCtrl_a = 0 %, the tensile force is reduced up to D0/DMax.
Characteristic for a linear torque profile ( C01035/1 = 2)
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)
Example: Steepness of the torque curve
Characteristic

Torque
 Diameter
D Current diameter (nDiameter_a)
D0 Initial point for diameter dependency (nD0_a)
Œ

DMin
(DMax)
D0 100 %
100 %
0 %
100 %
nCurveCtrl_a = 0 %
HW
HW
100 % HW – ( ) D0 ⋅
D
------------------------------------------------ +
Œ

DMin
(DMax)
D0 100 %
100 %
0 %
100 %
nCurveCtrl_a
0 %
50 %