Lenze DDS v2.3 Manual do Utilizador descarregar pdf (Página 43)

100

101

Drive PLC Developer Studio

Programming languages

4-5

l DDS EN 2.3

4.3.3 Instructions (overview)

The following instructions are available in ST:

Instruction type Example

Assignment by assignment operator A:=B;

CV:=CV+1;

C:=SIN(X);

Function block call

use of the FB output

CMD_TMR(IN:=%IX1.0.1, PT:=T#300ms);

A:=CMD_TMR.Q

RETURN RETURN;

IF condition D:=B*B;

IF D<0.0 THEN

C:=A;

ELSIF D=0.0 THEN

C:=B;

ELSE

C:=D;

END_IF;

CASE s election CASE INT1 OF

1: BOOL1:=TRUE;

2: BOOL2:=TRUE;

ELSE

BOOL1:=FALSE;

BOOL2:=FALSE;

END_CASE;

FOR loop J:=101;

FOR I:=1 TO 100 BY 2 DO

IF ARR[I]=70 THEN

J:=I;

EXIT;

END_IF;

END_FOR;

WHILE loop J:=1;

WHILE J<=100 AND ARR[J]<>70 DO

J:=J+2;

END_WHILE;

REPEAT loop J:=-1;

REPEAT

J:=J+2;

UNTIL J= 101 OR ARR[J]=70

END_REPEAT;

EXIT EXIT;

Dummy instruction ;

4.3.4 Assignment operator

The value of the expression on the right-hand side of an assignment is assigned to an operand

(variable, address) on the left-hand side of an assignment by using the assignment operator :=.

Example:

Var1 := Var2 * 10;

After this line has been executed Var1 is ten times the value of Var2.

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