FC_Poly5AbsExtremeValues - General Information
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Type: |
Function |
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Available as of: |
V1.0.3.0 |
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Versions: |
Current version |
Calculation of the extreme values of a 5th order equation.
Calculates the absolute extreme values of the 5th order polynomial for the interval [i_lrX0, i_lrX1] provided by the coefficient array i_alrCoefficients.
If the absolute extreme values of a polynomial, which meets specific boundary conditions, are to be calculated, the coefficient array of the polynomial can first be calculated by means of the function FC_Poly5Coefficients.
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Input |
Data type |
Description |
|---|---|---|
|
i_lrX0 |
LREAL |
Lower limit of the considered X interval. |
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i_lrX1 |
LREAL |
Upper limit of the considered X interval. |
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i_alrCoefficients |
ARRAY[0..5] OF LREAL |
Coefficient array of the polynomial whose absolute extreme values are to be calculated, with the element 5 being the coefficient of the highest order and the element 0 being the coefficient of the lowest order. |
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Output |
Data type |
Description |
|---|---|---|
|
q_etDiag |
General library-independent statement on the diagnostic. A value not equal to ET_Diag.Ok corresponds to an diagnostic message. |
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q_etDiagExt |
POU-specific output on the diagnostic. q_etDiag = ET_Diag.Ok -> Status message q_etDiag <> ET_Diag.Ok -> Diagnostic message |
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q_lrXAbsMin |
LREAL |
X-value of the absolute minimum of the polynomial for the considered interval. |
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q_lrYAbsMin |
LREAL |
Y value of the absolute minimum of the polynomial for the considered interval. |
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q_lrXAbsMax |
LREAL |
X value of the absolute maximum of the polynomial for the considered interval. |
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q_lrYAbsMax |
LREAL |
Y-value of the absolute maximum of the polynomial for the considered interval. |
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q_etDiag |
q_etDiagExt |
Enumeration value |
Description |
|---|---|---|---|
|
OK |
0 |
Ok |
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InputParameterInvalid |
97 |
The definition of the X interval is invalid. |
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Enumeration name: |
DefinitionXInterval |
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Enumeration value: |
97 |
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Description: |
The definition of the X interval is invalid. |
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Issue |
Cause |
Solution |
|---|---|---|
|
- |
The definition of the X interval via i_lrX1 and i_lrX0 is invalid. |
The following must hold: i_lrX1> i_lrX0 |
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Enumeration name: |
Ok |
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Enumeration value: |
0 |
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Description: |
Ok |
The extreme values have been calculated successfully.
