DIN EN 61158-4-16:2008-09

INTRODUCTION
1 Scope
  1.1 General
  1.2 Specifications
  1.3 Procedures
  1.4 Applicability
  1.5 Conformance
2 Normative references
3 Terms, definitions, symbols, abbreviations and conventions
  3.1 Reference model terms and definitions
  3.2 Service convention terms and definitions
  3.3 Other terms and definitions
  3.4 Abbreviations
  3.5 Symbols
  3.6 DLPDU IDN concept
4 DL-protocol overview
5 Basic DLPDU structure
  5.1 Overview
  5.2 MST DLPDU
  5.3 MDT DLPDU
  5.4 AT DLPDU
6 Network management methods
  6.1 Overview
  6.2 Enable and disable cyclic communication
  6.3 File transfer
  6.4 Status procedures
7 Data transmission methods
  7.1 Overview
  7.2 SVC
  7.3 RTC
8 DL management
  8.1 Overview
  8.2 Access to PhL
9 Error handling and monitoring
  9.1 Invalid telegrams
  9.2 Response to MDT and AT telegram failure
  9.3 Reaction to handshake timeout
  9.4 Service channel error messages
  9.5 Reaction to error messages in the service channel
  9.6 Error counters in the master and the slave
  9.7 Error effects on communication phases
  9.8 Monitoring in the master
  9.9 Monitoring in the slave
Annex A (normative) - IDN - Identification numbers
      A.1 IDN specification
      A.2 Identification numbers in numerical orders
      A.3 Detailed specification of communication-related IDNs
Bibliography
Annex ZA (normative) - Normative references to international
                       publications with their corresponding
                       European publications

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