EN 61158-6-20:2014

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols, abbreviations and
  conventions
4 Abstract syntax
5 Transfer syntax
6 Common procedures
7 FAL protocol state machines
Annex A (normative) - Application process status
Annex B (normative) - Device and dynamic variable
Annex C (normative) - Common tables
Annex D (normative) - Command requirements
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

IEC 61158-6-20:2014 defines the protocol provided to define the wire-representation of the service primitives defined in IEC 61158-5-20, and define the externally visible behavior associated with their transfer. This standard specifies the protocol of the Type 20 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545). This third edition cancels and replaces the second edition published in 2010 and constitutes a technical revision. The main changes are:- added protocol for new services that are added to IEC 61158-5-20;- added normative annexes;- updated then references, terms, definitions, symbols, abbreviations;- corrected the editorial errors and the text.