Data Structure: UNION

A UNION is a data structure with usually different data types.

In a union, all components have the same offset and therefore the same amount of storage space.

Example

TYPE NAME_AB:
UNION
        a : LREAL;
        b : LINT;
END_UNION
END_TYPE

If the ‎NAME_AB‎ type is written to a ‎nameVar‎ variable in the code, then this affects both ‎nameVar.a‎ and ‎nameVar.b‎.