F_MA_IsNAN

This function tests for presence of a NaN (Not-a-Number) value, returning TRUE when the value is a NaN.

FUNCTION F_MA_IsNAN : BOOL 
VAR_INPUT
     fValue : LREAL;
END_VAR

For further information see chapter Handling with NaN values.

F_MA_IsNAN 1:

The function is obsolete.

Please use the LrealIsNaN() function instead (Tc2_Utilities library).

Requirements

Development environment

Target system type

PLC libraries to include

TwinCAT v3.1.4013

PC or CX (x86, x64)

Tc3_MultiArray