Attention

IronPLC supports IEC 61131-3 Structured Text excluding I/O mapping.

P2009

Code

P2009

Message

Parent enumeration is not declared

This error occurs when an enumeration type extends from a parent enumeration that has not been declared.

Example

The following code will generate error P2009:

TYPE
    ChildEnum : (VALUE1, VALUE2) EXTENDS UndeclaredParentEnum;  (* Error: Parent enum not declared *)
END_TYPE

The enumeration ChildEnum tries to extend UndeclaredParentEnum which has not been declared.

To fix this error, declare the parent enumeration first:

TYPE
    BaseEnum : (BASE_VALUE1, BASE_VALUE2);
    ChildEnum : (VALUE1, VALUE2) EXTENDS BaseEnum;  (* Correct: Parent enum declared *)
END_TYPE