Curve_10XY_Real_Time

Curve_10XY_Real_Time (FB)

FUNCTION_BLOCK Curve_10XY_Real_Time

Short description

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

1. The X values must be consecutive either increasing or decreasing

2. 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_Time	stCurve_Real_Time			Array with the support points (data type X value: REAL, data type Y value: TIME)
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		1.0	Support point 1 - X value
tSP1_Y	TIME		T#1m	Support point 1 - Y value
rSP2_X	REAL		2.0	Support point 2 - X value
tSP2_Y	TIME		T#2m	Support point 2 - Y value
rSP3_X	REAL		3.0	Support point 3 - X value
tSP3_Y	TIME		T#3m	Support point 3 - Y value
rSP4_X	REAL		4.0	Support point 4 - X value
tSP4_Y	TIME		T#4m	Support point 4 - Y value
rSP5_X	REAL		5.0	Support point 5 - X value
tSP5_Y	TIME		T#5m	Support point 5 - Y value
rSP6_X	REAL		6.0	Support point 6 - X value
tSP6_Y	TIME		T#6m	Support point 6 - Y value
rSP7_X	REAL		7.0	Support point 7 - X value
tSP7_Y	TIME		T#7m	Support point 7 - Y value
rSP8_X	REAL		8.0	Support point 8 - X value
tSP8_Y’*	TIME		T#8m	Support point 8 - Y value
rSP9_X	REAL		9.0	Support point 9 - X value
tSP9_Y	TIME		T#9m	Support point 9 - Y value
rSP10_X	REAL		10.0	Support point 10 - X value
tSP10_Y	TIME		T#10m	Support point 10 - Y value

Function description

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

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

2. a change in value 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 consecutive 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 fulfilled. It is not active (= FALSE) if both conditions are fulfilled. \

Representation of an example characteristic curve

CODESYS

InOut:

Scope	Name	Type	Initial
Output	arData_Real_Time	ARRAY [1..10] OF stCurve_Real_Time
Output	xValidData	BOOL	FALSE
Output	xError	BOOL	FALSE
Input Const	tSP10_Y	TIME	TIME#10m0s0ms
Input Const	rSP10_X	REAL	10.0
Input Const	tSP9_Y	TIME	TIME#9m0s0ms
Input Const	rSP9_X	REAL	9.0
Input Const	tSP8_Y	TIME	TIME#8m0s0ms
Input Const	rSP8_X	REAL	8.0
Input Const	tSP7_Y	TIME	TIME#7m0s0ms
Input Const	rSP7_X	REAL	7.0
Input Const	tSP6_Y	TIME	TIME#6m0s0ms
Input Const	rSP6_X	REAL	6.0
Input Const	tSP5_Y	TIME	TIME#5m0s0ms
Input Const	rSP5_X	REAL	5.0
Input Const	tSP4_Y	TIME	TIME#4m0s0ms
Input Const	rSP4_X	REAL	4.0
Input Const	tSP3_Y	TIME	TIME#3m0s0ms
Input Const	rSP3_X	REAL	3.0
Input Const	tSP2_Y	TIME	TIME#2m0s0ms
Input Const	rSP2_X	REAL	2.0
Input Const	tSP1_Y	TIME	TIME#1m0s0ms
Input Const	rSP1_X	REAL	1.0