IEEE DRAFT 1379 : D12 2000

1 Overview
      1.1 Scope
      1.2 Purpose
      1.3 Distributed Network Protocol DNP3
      1.4 IEC 60870-5 Protocol
2 References
      2.1 IEEE Power Engineering Publications
      2.2 DNP3 Documents
      2.3 IEC 60870-5 Publications
      2.4 ITU-T Publications
3 Definitions
      3.1 Specific DNP/IEC 60870 Terms
      3.2 Acronyms and Abbreviations
4 Description of RTU-to-IED Communications Needs
      4.1 The Traditional SCADA Protocol
      4.2 Specific criteria used to select protocols for
             RTU-IED communication
5 Recommended Practice for RTU/IED Communication
      5.1 General Application Practice Using DNP3
      5.2 General Application Practice Using IEC-60870-5
             Standards
      5.3 Functionality of the 101 Companion Standard
             Profile
      5.4 Summary Comparative Description Tables
6 Physical layer definition (ISO/OSI Layer 1)
      6.1 Modes of Transmission
      6.2 Local Loop
      6.3 Recommended Physical Layer for DNP3
      6.4 Recommended Physical Layers for IEC 60870-5-101
             (1995)
7 Data Link Layer Definition (ISO/OSI Layer 2)
      7.1 Recommended Data Link Layer for DNP3
      7.2 Recommended Data Link Layer for IEC 60870-5-101
      7.3 DNP3 Pseudo-Transport Layer (ISO/OSI Layer 4)
8 Application Layer Definition (ISO/OSI Layer 7)
      8.1 Recommended Application Layer for DNP3
      8.2 Recommended Application Layer for IEC
             60870-5-101 (1995)
9 Definitions of Data Elements and Objects
      9.1 DNP3 Data Element/Object Definition
      9.2 IEC 60870-5 Data Element Definition
      9.3 Comparative Tables of Defined Objects and Data
             Elements
10 Process for Addition of Data Elements/Objects
      10.1 Creation
      10.2 Role of the DNP Users Group
Annex A (informative) Comparison of DNP3 and IEC 60870-5-101
      A.1 - Communication protocol layer structure
      A.2 - Message/function types
      A.3 - Data objects - primitive
      A.4 - Data elements with utility specific definitions
Annex B (informative) Protocol implementations
      B.1 - DNP3 Implementation
      B.2 - DNP3 Implementation Examples
      B.3 - IEC 60870-5-101 Implementation
      B.4 - 101 Implementation Example
      B.5 - IEC 60870-5-101 Example Vendor Device
            Implementation

Gives a uniform set of guidelines for communications and interoperation of IEDs and Remote Terminal Units (RTUs) in an electric utility substation. It does not establish an underlying communication standard, instead it gives a specific limited subset of two existing communications protocols, to encourage understanding and timely application.