Attention

IronPLC can only run very simple programs. The steps described are accurate but many language features are not yet supported.

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