This document specifies a part of the application, the application layer, and the presentation layer.
The application covers the
— device model,
— registry management,
— connection management for streaming data,
— diagnosis, and
— error handling.
The application layer covers the structure of MOST messages consisting of
— addressing,
— function block identifiers,
— instance identifiers,
— function identifiers,
— operation types, and
— timing definitions.
The presentation layer covers the definition of data, basic data types and function classes.