Lenze DDS v2.3 Manuel d'utilisateur télécharger pdf (Page 45)

Drive PLC Developer Studio

Programming languages

4-7

l DDS EN 2.3

Example:

IF temp < 17 THEN

heating_on:=TRUE;

ELSE

heating_on:=FALSE;

END_IF;

In this example the heating is switched on only if the temperature falls below 17 degrees Centigrade,

otherwise the heating will remain off.

4.3.8 CASE instruction

Use the CASE instruction to aggregate several conditional instructions with the same conditional

variable.

Syntax:

CASE <Var1> OF

...

ELSE

END_CASE;

A CASE instruction is processed as described below:

• Ifthevariablein<Var1> is set to <Value i>, the instruction <instruction i> will be

executed.

• If <Var 1> does not equal one of the specified values, the <ELSE instruction> will be

executed.

• If the same instruction is to be executed for several variable values, these values can be

comma-separated to indicate that they are linked to the same instruction.

• If the same instruction is to be executed for a value aggregate of the variable, the start and

end values can be separated by two successive periods to indicate that they are linked to the

same instruction.

Example:

CASE INT1 OF

1,5:BOOL1:=TRUE;

BOOL3:=FALSE;

2:BOOL2:=FALSE;

BOOL3:=TRUE;

10..20:BOOL1:=TRUE;

BOOL3:=TRUE;

ELSE

BOOL1:=NOT BOOL1;

BOOL2:=BOOL1 OR BOOL2;

END_CASE;

Show/Hide Bookmarks

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 339 340

Commentaires sur ces manuels

Pas de commentaire

Lenze DDS v2.3 Manuel d'utilisateur Page 45

Commentaires sur ces manuels

Produits connexes et manuels pour Matériel Lenze DDS v2.3