STRING_TO_UDINT

STRING (decimal format) into unsigned DOUBLE INTEGER

STRING_TO_UDINT converts a string in decimal format into a value of the data type Unsigned DOUBLE INTEGER.

First, the string is converted into a value of the data type STRING[32], which is subsequently converted into a value of the data type UDINT in a subprogram with approximately 270 steps. This subprogram is also used by the functions STRING_TO_INT, STRING_TO_WORD, STRING_TO_UDINT and STRING_TO_DWORD.

Remarks

Acceptable format: '[Space][Sign][Decimal number][Space]' e.g. ' 123456 '

Acceptable characters:

Space

Space ""
Sign

"+“ (plus), "-" (minus)
Decimal numbers

Decimal numbers "0 - 9“

The analysis ends with the first non-decimal number.

Parameters

Input

Unnamed input (STRING): Input data type

Output

Unnamed output (UDINT): Conversion result

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
		UDINT_value: UDINT:=0;
		STRING_value: STRING[10]:='3147483647';
	END_VAR

LD body

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,STRING_TO_UDINT!,Instance,15,1,25,3,,?D?C);
B(B_VARIN,,STRING_value,13,1,15,3,);
B(B_VAROUT,,UDINT_value,25,1,27,3,);
L(1,0,1,5);
        END_NETWORK_BODY
    END_NET_WORK
END_BODY

ST body

UDINT_value := STRING_TO_UDINT(STRING_value);