ABS

Absolute value

ABS calculates the value in the accumulator into an absolute value. The result is saved in the output variable.

Parameters

Input

Unnamed input (INT, DINT, UINT, UDINT, REAL, LREAL): Input data type

Output

Unnamed output (INT, DINT, UINT, UDINT, REAL, LREAL): Output as input: absolute value

Example

POU header

All input and output variables used for programming this function have been declared in the POU header. The same POU header is used for all programming languages.

	VAR
		input_value: INT:=-123;
		output_value: INT:=0;
	END_VAR

This example uses variables. You can also use a constant for the input variable.

LD body

input_value of the data type INTEGER is converted into an absolute value of the data type INTEGER. The converted value is written into absolute_value.

BODY
    WORKSPACE
        NETWORK_LIST_TYPE := NWTYPELD ;
        ACTIVE_NETWORK := 0 ;
    END_WORKSPACE
    NET_WORK
        NETWORK_TYPE := NWTYPELD ;
        NETWORK_LABEL :=  ;
        NETWORK_TITLE :=  ;
        NETWORK_HEIGHT := 5 ;
        NETWORK_BODY
B(B_F,ABS!,Instance,8,2,13,4,,?D?C);
B(B_VARIN,,input_value,6,2,8,4,);
B(B_VAROUT,,output_value,13,2,15,4,);
L(1,0,1,5);
        END_NETWORK_BODY
    END_NET_WORK
END_BODY

ST body

absolute_value:=ABS(input_value);

IL body

LD	input_value
ABS
ST	absolute_value