AverageCh

AverageCh (FB)

FUNCTION_BLOCK AverageCh

Short description

Formation of an average from up to six weighted numerical input values Typical application: formation of a room temperature average from different sensors

Representation

Interfaces

Inputs

Name	Data type	Value range	Initial value	Function
rIn1	REAL			Analog value input 1
rIn2	REAL			Analog value input 2
rIn3	REAL			Analog value input 3
rIn4	REAL			Analog value input 4
rIn5	REAL			Analog value input 5
rIn6	REAL			Analog value input 6
xEn1	BOOL			Enable analog value input 1
xEn2	BOOL			Enable analog value input 2
xEn3	BOOL			Enable analog value input 3
xEn4	BOOL			Enable analog value input 4
xEn5	BOOL			Enable analog value input 5
xEn6	BOOL			Enable analog value input 6

Outputs

Name	Data type	Value range	Initial value	Function
rOut	REAL			Average
xErr	BOOL			Aggregate fault

Setpoints / parameters

Name	Data type	Value range	Initial value	Function
iLoading6	INT		10	Weighting - analog value input 6
iLoading5	INT		10	Weighting - analog value input 5
iLoading4	INT		10	Weighting - analog value input 4
iLoading3	INT		10	Weighting - analog value input 3
iLoading2	INT		10	Weighting - analog value input 2
iLoading1	INT		10	Weighting - analog value input 1

Function description

Average rOut

The average is formed by multiplying the analog value inputs rInX by their individual weighting iLoadingX and then summing all products (dividend). The sum of the weightings is formed by adding the individual weightings (= divisor). The quotient obtained in this way is finally available as the average rOut available. The individual weighting of an analog value input X always has the value 0.0 as long as the enable for analog value input X xEnX is locked (= FALSE). If the sum of the weightings (divisor) = zero, then the output rOut constantly outputs the value 0.0. Legend: X = 1 to 6

Aggregate fault xErr

The collective fault is active (= TRUE) if at least one of the analog value inputs rInX is locked (xEnX = FALSE). In all other cases the collective fault is not active (= FALSE).

CODESYS

InOut:

Scope	Name	Type	Initial
Input	rIn1	REAL
Input	rIn2	REAL
Input	rIn3	REAL
Input	rIn4	REAL
Input	rIn5	REAL
Input	rIn6	REAL
Input	xEn1	BOOL
Input	xEn2	BOOL
Input	xEn3	BOOL
Input	xEn4	BOOL
Input	xEn5	BOOL
Input	xEn6	BOOL
Input Const	iLoading6	INT	10
Input Const	iLoading5	INT	10
Input Const	iLoading4	INT	10
Input Const	iLoading3	INT	10
Input Const	iLoading2	INT	10
Input Const	iLoading1	INT	10
Output	rOut	REAL
Output	xErr	BOOL