Curve_10XY_Real_Real

Curve_10XY_Real_Real (FB)

FUNCTION_BLOCK Curve_10XY_Real_Real

Short description

Input of 10 value pairs (support points each with one X and one Y value) Boundary conditions:\

• The X values must be sequentially either increasing or decreasing

• Two consecutive X values must not be equal

Typical application: Passing a characteristic curve with 10 support points

Representation

Interfaces

Outputs

Name	Data type	Value range	Initial value	Function
arData_Real_Real’	stCurve_Real_Real			Array with the support points (data type X value: REAL, data type Y value: REAL)
xValidData	BOOL		FALSE	Validity of the data in the output array (TRUE = valid)
xError’	BOOL		FALSE	Error state of the entered support points (TRUE = error)

Setpoints / Parameters

Name	Data type	Value range	Initial value	Function
rSP1_X	REAL		1	Support point 1 - X value
rSP1_Y	REAL		1	Support point 1 - Y value
rSP2_X	REAL		2	Support point 2 - X value
rSP2_Y	REAL		2	Support point 2 - Y value
rSP3_X	REAL		3	Support point 3 - X value
rSP3_Y	REAL		3	Support point 3 - Y value
rSP4_X	REAL		4	Support point 4 - X value
rSP4_Y	REAL		4	Support point 4 - Y value
rSP5_X	REAL		5	Support point 5 - X value
rSP5_Y	REAL		5	Support point 5 - Y value
rSP6_X	REAL		6	Support point 6 - X value
rSP6_Y	REAL		6	Support point 6 - Y value
rSP7_X	REAL		7	Support point 7 - X value
rSP7_Y	REAL		7	Support point 7 - Y value
rSP8_X	REAL		8	Support point 8 - X value
rSP8_Y	REAL		8	Support point 8 - Y value
rSP9_X	REAL		9	Support point 9 - X value
rSP9_Y	REAL		9	Support point 9 - Y value
rSP10_X	REAL		10	Support point 10 - X value
rSP10_Y	REAL		10	Support point 10 - Y value

Function description

The array at the output arData_Real_Real is filled with the entered data of the 10 support points, if \

1. there is no active error in the input of the support points (xError = FALSE) AND

2. a value change has occurred in the entered data\

The output 'xValidData' is active (= TRUE) if the data in the output array are valid. The data in the output array may differ from the entered data if the entered data contain an error. When specifying the X values, the following boundary conditions apply: 1) The X values must be sequentially either increasing or decreasing 2) Two consecutive X values must not be equal The output 'xError' is active (= TRUE) if at least one of these two conditions is not met. It is not active (= FALSE) if both conditions are met. \

Representation of an example characteristic curve

CODESYS

InOut:

Scope	Name	Type	Initial
Output	arData_Real_Real	ARRAY [1..10] OF stCurve_Real_Real
Output	xValidData	BOOL	FALSE
Output	xError	BOOL	FALSE
Input Const	rSP10_Y	REAL	0.0
Input Const	rSP10_X	REAL	26.0
Input Const	rSP9_Y	REAL	100.0
Input Const	rSP9_X	REAL	25.0
Input Const	rSP8_Y	REAL	100.0
Input Const	rSP8_X	REAL	15.0
Input Const	rSP7_Y	REAL	75.0
Input Const	rSP7_X	REAL	14.0
Input Const	rSP6_Y	REAL	75.0
Input Const	rSP6_X	REAL	8.0
Input Const	rSP5_Y	REAL	50.0
Input Const	rSP5_X	REAL	7.0
Input Const	rSP4_Y	REAL	50.0
Input Const	rSP4_X	REAL	-4.0
Input Const	rSP3_Y	REAL	25.0
Input Const	rSP3_X	REAL	-5.0
Input Const	rSP2_Y	REAL	25.0
Input Const	rSP2_X	REAL	-13.0
Input Const	rSP1_Y	REAL	0.0
Input Const	rSP1_X	REAL	-14.0