Statistics_LREAL (FB)¶

FUNCTION_BLOCK Statistics_LREAL

This function block will update the values of minimum, maximum and average with respect to the integral input parameter \(x_{n}\), which will be added to a set of integral data \(x_{n-1},\dots,n_{1}\) (stemming from previous calls).

The arithmetic mean \(\bar{x}\) of the values \(x_{n},\dots,x_{1}\) is calculated by:

\[\bar{x} = \frac{1}{n}\sum_{i=1}^{n}x_{i}\]

InOut:

Scope	Name	Type	Initial	Comment
Input	`xEnable`	`BOOL`		Reset
Input	`lrInput`	`LREAL`		New data \(x_{n}\)
Output	`lrMin`	`LREAL`	LREAL#1E+80	Minimum of set \(x_{n},\dots,x_{1}\)
	`lrMax`	`LREAL`	LREAL#-1E+80	Maximum of set \(x_{n},\dots,x_{1}\)
	`lrAverage`	`LREAL`		Arithmetic mean of data \(x_{n},\dots,x_{1}\)
	`xOverrun`	`BOOL`		`TRUE`: In case of overflow The module will compensate this by a minor weighting of the old data leading to inaccuracy of the result