Lenze DDS v2.3 Manual do Utilizador descarregar pdf (Página 282)

100

101

Drive PLC Developer Studio

IEC 61131-3 Operators

12-12

DDS EN 2.3

12.6 Addressing operators

12.6.1 ADR

Addressing function

ADR returns the data memory address of its argument in a DWORD. The determined address can be

assigned to a pointer within the project.

Examples

IL ST FBD

LD var1

ADR

ST pt

12.6.2 Contents operator

A pointer is de-referenced by means of the contents operator ^ behind the pointer identifier.

Examples

Declaration

FBD

pt:POINTER TO INT;

var:int1:INT;

vat_int2:INT

Implementation

LD var_int1

ADR

ST pt

LD pt^

ST var_int2

pt:POINTER TO INT;

var_int1:INT;

var_int2:INT;

Implementation

pt := ADR(var_int1);

var_int2:=pt^;

12.7 Call operator

12.7.1 CAL

Calling up a function block

CAL is used to call up the instance of a function block in IL.

The name of the instance of a function block is followed by the assignment of the input variables of

the function block in parentheses.

Example:

Calling up the instance Inst of a function block with the input variables

Par1, Par2 setto0orTRUE.

CAL INST(PAR1 := 0, PAR2 := TRUE)

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