POUTypeClass (GVL)

The three lower order bits of the third nibble designate the POU type.

InOut:

Scope	Name	Type	Initial	Comment
Constant	TYPE_POU_FUNCTION	INT	16#100	POU type function
	TYPE_POU_FUNCTION_BLOCK	INT	16#200	POU type function block
	TYPE_POU_PROGRAM	INT	16#300	POU type program
	TYPE_POU_STRUCTURE	INT	16#400	POU type structure
	TYPE_POU_UNION	INT	16#500	POU type union
	TYPE_POU_UABUILTIN	INT	16#1000	POU UA builtin type