SN EN 60870-5-3 : 1992

Cooperating organizations
National foreword
Foreword
Introduction
1. Scope and object
2. Normative references
3. Definitions
4. Relation to the ISO reference model
5. Structure of application data
5.1 Application service data unit
5.1.1 Data unit identifier
5.1.2 Information objects
5.1.3 Identification of information objects
5.1.4 Information objects address schemes
5.1.5 Sets of information elements
6. Guideline for constructing APPLICATION SERVICE
       DATA UNITS
6.1 First step: Selection of field elements of DATA
       UNIT IDENTIFIER
6.2 Second step: Definition of lengths of field
       elements of DATA UNIT IDENTIFIER
6.3 Third step: Definition of data types of DATA UNIT
       IDENTIFIER
6.4 Fourth step: Definition of INFORMATION OBJECTS
6.5 Fifth step: Assignment of INFORMATION OBJECTS to
       TYPE IDENTIFICATION and definition of semantics
Annex ZA (normative) Other international publications
quoted in this standard with the references of the
relevant European publications
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

Describes the general structure of application data without specifying details about information fields and their contents. Describes basic rules to specify application data units. Applies to telecontrol equipment and systems with coded bit serial data transmission for controlling and monitoring geographically widespread processes.