FC_IsLrealValid

FC_IsLrealValid - General Information

Overview

Task

Verify if i_lrValue is a valid LREAL value.

Description

An invalid LREAL value occurs during the execution of non-permissible mathematical operations such as e.g. 1.0 / 0.0, SQRT(-1.0) or ASIN(1.1).

Interface

Input	Data type	Description
i_lrValue	LREAL	The LREAL value to be checked

Output	Data type	Description
q_etDiag	GD.ET_Diag	General library-independent statement on the diagnostic. A value not equal to ET_Diag.Ok corresponds to an diagnostic message.
q_etDiagExt	ET_DiagExt	POU-specific output on the diagnostic. q_etDiag = ET_Diag.Ok -> Status message q_etDiag <> ET_Diag.Ok -> Diagnostic message

Output

Data type

Description

q_etDiag

General library-independent statement on the diagnostic.

A value not equal to ET_Diag.Ok corresponds to an diagnostic message.

q_etDiagExt

POU-specific output on the diagnostic.

q_etDiag = ET_Diag.Ok -> Status message

q_etDiag <> ET_Diag.Ok -> Diagnostic message

Return Value

Data type	Description
BOOL	TRUE -> i_lrValue is a valid LREAL value FALSE -> i_lrValue is not a valid LREAL value (“Not A Number”).

Diagnostic Messages

q_etDiag	q_etDiagExt	Enumeration value	Description
OK	Ok	0	Ok

The verification of the LREAL number has been performed.