Declaration of a program in ST

Syntax

PROGRAM name
 
(* optional: declaration of variables *)
 
(* optional: body of program *)
 
END_PROGRAM

Meaning
declaration of a →program, `name` must be an →IEC-identifier. The declaration is possible within an ST-object – the declaration is done within the global →namespace. After you have created a new project, a program is already declared in the predefined ST-object. `PROGRAM` and `END_PROGRAM` are →keywords for the declaration of the program.

Example

PROGRAM Motor
END_PROGRAM 

You are able to use the following language elements for ST within a program:

Page:Read-only statement
Page:Statement to ignore ST-objects
Page:Statement to suppress warnings
Page:SFC elements in ST
Page:Call of function in ST
Page:Aufruf der Funktionsbaustein-Instanz in ST
Page:Call of method in ST
Page:CASE statement in ST
Page:CONTINUE statement in ST
Page:Declaration of variables based on an interface
Page:Deklaration von Ausgangsvariablen in ST
Page:Deklaration von Eingangsvariablen in ST
Page:Declaration of function block instances in ST
Page:Declaration of global variables in ST
Page:Declaration of internal variables in ST
Page:Declaration of temporary variables in ST
Page:Property statement in ST
Page:EXIT statement in ST
Page:FOR statement in ST
Page:IF statement in ST
Page:Comments in ST
Page:Empty statement in ST
Page:Blanks, tabs or new lines in ST
Page:REPEAT statement in ST
Page:RETURN statement in ST
Page:WHILE statement in ST
Page:Assignments in ST
Page:Assignment attempt in ST

The usage of these language elements makes it possible to use other elements (e.g. declaration of STRING variables within the section VAR ... END_VAR ) as well. Such elements are not listed here.