I.S. EN 61158-4-17:2008

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
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Describes: a) 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 datalink service provider; b) the structure of the fieldbus DLPDUs used for the transfer of data and control information by the protocol of this standard, and their representation as physical interface data units.