Lenze DDS Function library Drive - Manual (Page 27)

Function library LenzeDrive.lib
Analog signal processing
2.2.9 Curve function (L_CURVE)
2−17
L
LenzeDrive.lib EN 1.7
2.2.9 Curve function (L_CURVE)
This FB converts an analog signal into a characteristic curve.
Y0 = nY0
Y1 = nY1
Y2 = nY2
Y100 = nY100
X1 =
nX1
X2 = nX2
L_CURVE
nIn_a
1
2
3
Characteristic 3
x
y
x1 x2
y1 y0
y2
y100
x
y
x1
y1
y0
y100
x
y
y0
y100
1
2
3
nOut_a
byFunction
Characteristic 2
Characteristic 1
Fig. 2−15 Curve function (L_CURVE)
VariableName DataType SignalType VariableType Note
nIn_a Integer analog VAR_INPUT
nOut_a Integer analog VAR_OUTPUT
byFunction Byte VAR CONSTANT RETAIN Selection of the characteristic/curve function
nY0 Integer VAR CONSTANT RETAIN Entry of Y0 from vector (0, Y0)
nY1 Integer VAR CONSTANT RETAIN Entry of Y1 from vector (X1, Y1)
nY2 Integer VAR CONSTANT RETAIN Entry of Y2 from vector (X2, Y2)
nY100 Integer VAR CONSTANT RETAIN Entry of Y100 from vector (16384, Y100)
nX1 Integer VAR CONSTANT RETAIN Entry of X1 from vector (X1, Y1)
nX2 Integer VAR CONSTANT RETAIN Entry of X2 from vector (X2, Y2)
Parameter codes of the instances
VariableName L_CURVE1 SettingRange Lenze
byFunction C0960 1 ... 3 1
nY0 C0961 0 ... 199.99 % 0.00
nY1 C0962 0 ... 199.99 % 50.00
nY2 C0963 0 ... 199.99 % 75.00
nY100 C0964 0 ... 199.99 % 100.00
nX1 C0965 0.01 ... 99.99 % 50.00
nX2 C0966 0.01 ... 99.99 % 75.00
Function
Selection of the function Curve function Informationen for entry of the interpolation points
byFunction = 1 Characteristic with two co−ordinates ^ Fig. 2−16
byFunction = 2 Characteristic with three co−ordinates ^ Fig. 2−17
byFunction = 3 Characteristic with four interpolatio points ^ Fig. 2−18
·
100% corresponds to 16384.
·
A linear interpolation is carried out between the co−ordinates.
·
For negative values at nIn_a the settings of the interpolation points are processed inversely
(see line diagrams).
– If this is not required, insert an FB L_ABS or an FB L_LIM before or after the FB L_CURVE.