User-defined attributes

Custom attributes are any project or user-defined attributes that you can apply to POUs, actions, data type definitions and variables. You can query a custom attribute before compiling the PLC project using conditional pragmas.

	You can query custom attributes with conditional pragmas using the hasattribute operator.

Syntax: {attribute 'attribute'}

Examples of POUs and actions:

Attribute 'vision' for function F_Sample:

{attribute 'vision'} 
FUNCTION F_Sample : INT 
VAR_INPUT 
    nSample : INT; 
END_VAR

Examples for variables:

Attribute 'DoCount' for variable nVar:

PROGRAM MAIN 
VAR 
    {attribute 'DoCount'}; 
    nVar : INT; 
    bVar : BOOL; 
END_VAR

Example for data types:

Attribute 'aType' for data type ST_MyType:

{attribute 'aType'} 
TYPE ST_MyType : 
STRUCT 
    nTest : INT; 
    bTest : BOOL; 
END_STRUCT 
END_TYPE

See also:

Conditional pragmas