Lenze 8400 TopLine - Manual (Page 1482)

19 Function library
19.1 Function blocks
1482
Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
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19.1.73 L_Curve_3
This FB can optionally display a characteristic function or a curve function y=f(x), the X axis being
the input signal and the Y axis being the output signal.
• A limitation of the input value can be set in C01031/1 (upper limit) and C01031/2 (lower limit).
• The output value is internally limited to ±199.99 %. If a limitation of the output value is active,
bLimit is set to TRUE.

Tip!
From version 12.00.00 onwards the FB L_Curve_3 can be used to create a tensiel force
dependingt on the diameter for winding applications. For this purpose, the FB has been
extended by further inputs/outputs and parameters.
 Use of the L_Curve_3 for tensile force characteristic
Inputs
Identifier
Data type
Information/possible settings
nIn_a
INT
Input value (x)
• ±16384 ≡ ±100 %
• A limitation of the input value can be set in C01031/1 (upper limit) and C01031/2
(lower limit).
When using the FB for tensile force characteristic (from V12.00.00) :
Maximum tensile force setpoint in [%]
The following inputs are only relevant when the FB is used for tensile force characteristic:
nCurveCtrl_a
INT
From version 12.00.00
Slope of the characteristic (torque characteristic) in [%]
• ±16384 ≡ ±100 %
• Internal limitation to -100 ... +200 %
• With 100 %, there is a constant tensile force curve and thus a torque
proportionally rising with D.
nD0_a
INT
From version 12.00.00
Initial point of the characteristic
• 16384 ≡ 100 % ≡ maximum diameter
nDiameter_a
INT
From version 12.00.00
Current diameter in [%]
• 16384 ≡ 100 % ≡ maximum diameter
bEnableTensionCurve
BOOL
From version 12.00.00
Activate tensile force setpoint
FALSE Tensile force setpoint is not influenced.
TRUE Tensile force setpoint is multiplied by the characteristic value.
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