P2043¶

Code: P2043
Message: Enumerated value is declared by more than one enumeration and its type cannot be told from where it is used

This error occurs when an enumerated value is written without its type, two or more enumerations declare it, and the place where it is used does not say which enumeration is meant.

The place a value is used in usually says which enumeration is meant (see Enumerated Types). Where it does not, the value has the type of the one enumeration that declares it. The enumerations considered are the named enumerations and the inline enumerations of the variables in scope. Enumerations with the same members, such as an enumeration and its alias, count as one.

Example¶

The following code will generate error P2043:

Try it

Source

TYPE
    Color : (Red, Green);
    Light : (Off, Green);
END_TYPE

PROGRAM main
    VAR
        code : DINT;
    END_VAR
    code := Green;  (* Error: Green of Color or of Light? *)
END_PROGRAM

code is a DINT, so the assignment does not say whether Green is the value of Color or the value of Light.

To fix this error, use the value where its type is known, such as in an assignment to a variable of the enumeration:

Try it

Source

TYPE
    Color : (Red, Green);
    Light : (Off, Green);
END_TYPE

PROGRAM main
    VAR
        light : Light;
        is_green : BOOL;
    END_VAR
    light := Green;             (* Correct: the type of light *)
    is_green := light = Green;  (* Correct: the type of light *)
END_PROGRAM

P2043¶

Example¶

See Also¶