Published
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.
PUBLISHED
ISO 21806-2:2020
90.20
Standard under periodical review
Jul 15, 2025
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