LimitAlarm_LREAL (FB)¶

FUNCTION_BLOCK LimitAlarm_LREAL

This function block checks whether the value \(x \in \mathbb{R}\) lies between an lower bound \(x_{u} \in \mathbb{R}\) and an upper bound \(x_{o} \in \mathbb{R}\).

The output value will be set according to the result.

InOut:

Scope	Name	Type	Comment
Input	`lrValue`	`LREAL`	value \(x \in \mathbb{R}\) to be tested
	`lrLimitPos`	`LREAL`	upper bound \(x_{o} \in \mathbb{R}\)
	`lrLimitNeg`	`LREAL`	lower bound \(x_{u} \in \mathbb{R}\)
Output	`xExceedsPos`	`BOOL`	`TRUE`: If \(x > x_{o}\) `FALSE`: Else
	`xExceedsNeg`	`BOOL`	`TRUE`: If \(x < x_{u}\) `FALSE`: Else
	`xInLimits`	`BOOL`	`TRUE`: If \(x_{u} \leq x \leq x_{u}\) `FALSE`: Else, also in the atypical case \(x_{o} < x_{u}\)