FIX16Sub

This function subtracts two signed 16-bit fixed-point numbers. The resolution (number of decimal places) of the numbers does not have to be the same. The resolution of the number with the higher number of decimal places is reduced before subtraction. This means that the decimal places of the number with the higher resolution are truncated. The result of the subtraction is a signed 16-bit fixed-point number.

Return value

Name	Type	Description
FIX16Sub	T_FIX16

Inputs

VAR_INPUT
    minuend    : T_FIX16;
    subtrahend : T_FIX16;
END_VAR

Name	Type	Description
minuend	T_FIX16	Number from which a value is subtracted
subtrahend	T_FIX16	Number that is subtracted

Example:

PROGRAM FIXSUB
VAR
    a, b   : T_FIX16;
    result : LREAL;
END_VAR

a := LREAL_TO_FIX16( 0.5, 8 );
b := LREAL_TO_FIX16( 0.75, 8 );

result := FIX16_TO_LREAL( FIX16Sub( a, b ) ); (* The result is: -0.25 *)

Requirements

Development environment	Target platform	PLC libraries to be integrated (category group)
TwinCAT v3.1.0	PC or CX (x86, x64, Arm^®)	Tc2_Utilities (System)