CEI EN 61158-4-1 : 2016

FOREWORD
0 INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
4 Overview of the DL-protocol
5 General structure and encoding of PhIDUs and DLPDUs, and
   related elements of procedure
6 DLPDU-specific structure, encoding and elements of procedure
7 DLPDU-parameter structure and encoding
8 DL-service elements of procedure
9 DL-support subprotocol
10 Other DLE elements of procedure
11 PICS proforma
Annex A (informative) - Exemplary FCS implementation
Annex B (informative) - Type 1: Formal protocol finite state
        machines
Annex C (informative) - Type 1: DLPDU and DL-addressing
        short-form summaries
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Specifies basic time-critical messaging communications between devices in an automation environment.