Custom attribute

User-defined attributes are any application-defined or user-defined attributes that you can apply to POUs, actions, data type definitions and variables. You can query a user-defined attribute with the help of conditional pragmas before the compilation of the application.

Tip

You can query user-defined attributes with conditional pragmas with the operator hasattribute.

For more information and examples, see: Conditional Pragmas

Syntax:

{attribute 'attribute'}

Example 254. POUs and actions

Attribute 'vision' for function fun1

{attribute 'vision'}
FUNCTION fun1 : INT
VAR_INPUT
    i : INT;
END_VAR

Example 255. Variables

'DoCount' attribute for ivar variable:

PROGRAM PLC_PRG
VAR
    {attribute 'DoCount'};
    ivar:INT;
    bvar:BOOL;
END_VAR

Example 256. Data Types

Attribute 'aType' for data type DUT_1:

{attribute 'aType'}
TYPE DUT_1 :
STRUCT
    a:INT;
    b:BOOL;
END_STRUCT
END_TYPE