IEC 61158-4-17:2007

FOREWORD
INTRODUCTION
1 Scope
  1.1 General
  1.2 Specifications
  1.3 Procedures
  1.4 Applicability
  1.5 Conformance
2 Normative reference
3 Definitions
  3.1 Terms and definitions
  3.2 Abbreviations and symbols
  3.3 Conventions
4 Overview of the DL-protocol
  4.1 General
  4.2 Characteristics of the protocol
  4.3 Data-link layer architecture
  4.4 Services provided by the DLL
  4.5 Network sharing with other protocols
5 DLPDU-parameter structure and encoding
  5.1 Overview
  5.2 DLPDU common header format
  5.3 DLPDU body format
6 Local parameters and resources
  6.1 General
  6.2 Parameters and resources related to network structure
  6.3 Parameters and resources to support real-time
      data transfer
  6.4 Parameters and resources to support the scheduling
      function
  6.5 Parameters and resources to support the security
      function
7 DL-service elements of procedure
  7.1 Unacknowledged unitdata transfer service (UUS)
  7.2 Acknowledged unitdata transfer service (AUS)
  7.3 Acknowledged sequence of unitdata transfer service
      (ASS)
  7.4 Multipoint unitdata transfer service (MUS)
  7.5 Multipoint sequence of unitdata transfer service (MSS)
8 DL-support protocol
  8.1 Transmission scheduling
  8.2 Redundancy
  8.3 DLPDU authentication
Bibliography

IEC 61158-4-17:2007, defines the data-link layer which provides basic time-critical messaging communications between devices in an automation environment. It defines procedures for the timely transfer of data and control information from one data-link user entity to a peer user entity, and among the data-link entities forming the distributed data-link service provider. This first edition and its companion parts of the IEC 61158-4 subseries cancel and replace IEC 61158-4:2003. It includes the following:
- deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data link layer, for lack of market relevance;
- addition of new types of fieldbuses;
- division of this part into multiple parts numbered -4-1, -4-2, ..., -4-19. This bilingual version (2013-09) corresponds to the monolingual English version, published in 2007-12.