What is a Structure?
It is a data item containing a set of data of a different type, such as:
a group of BOOL, WORD, UNINT, etc. , (EDT structure),
a group of tables (DDT structure),
a group of REAL, DWORD, tables, etc., (EDT and DDT structures).
NOTE: You can create nested structures (nested DDTs)
over 15 levels. Recurring structures (DDT) are not allowed.
Characteristics
A structure is composed of data which are each characterized by:
a type,
a name, which enables it to be identified,
a comment (optional) describing its role.
Definition of a structure type:
Definition of two data instances of an IDENT type structure:
Access to the Data of a Structure
Access to the data of the Person_1 IDENT-type instance:
