IEC 60870-5-1:1990

Contents
Foreword
Preface
Introduction
Clause
1. Scope
2. Object
3. Requirements for data transmission in telecontrol
    systems
    3.1 High data integrity and data consistency
    3.2 Shoer telecontrol transfer time
    3.3 Support of bit oriented (code transparent)
         data transmission
4. Quantified rating of data integrity in telecontrol
    systems
5. Quantified rating of transmission efficiency
6. Transmission protocol specifications
    6.1 Physical layer
    6.2 Link layer
         6.2.1 Link service classes provided
         6.2.2 Dialogue procedures
         6.2.3 Standard frame synchronization
         6.2.4 Standard frame formats
         6.2.5 Synchronization in transmission channels
                using switched carrier frequency
         6.2.6 Main application fields of the defined
                format classes
         6.2.7 Use of HDLC (High level data link control)
                -protocols
Appendix A - Effect of signal quality supervision on
             transmission efficiency and data integrity
Appendix B - Quantitative ratings of data integrity and
             transmission efficiency

Covers asynchronous data transmission with half duplex and duplex link protocols operating with window size one for message transfers.
Specifies the basic requirements for services to be provided by the link plus physical layers, for telecontrol applications. In particular it specifies standards on coding, formatting and synchronizing data frames of variable and filed lengths which meet specified data integrity requirements.


This publication is of high relevance for Smart Grid.