DNP3 and IEC 60870-5

BillRobinson · Aug 25, 2008

Are DNP3 and IEC 60870-5 the same or are they slightly different?

Maj. Toxido · Aug 26, 2008

DNP3 and IEC 60870-5 Standards

BillRobinson said:
Are DNP3 and IEC 60870-5 the same or are they slightly different?

Distributed network protocol (DNP3)

DNP3 is essentially a three-layer protocol using the layer 1, 2, and 7 of the

ISO/OSI communication profile set. It is specifically designed for data

acquisition and control applications, and focuses its application information in

the area of electric utility data transmission. This recommended practice

specifies the level 2 subset implementation of DNP3 as published.

DNP3 protocol was built on the framework specified by the IEC 60870-5

documents, and developed in response to market demands, including the need

for early publication of a full protocol description that can be implemented in

commonly available hardware. DNP3 is controlled by a DNP3 user group that

includes a technical committee charged with reviewing problems,

recommending enhancements, and updating the protocol documents

IEC 60870-5 protocol

The IEC Technical Committee 57 Working Group 03 (TC57 WG03) was chartered to develop protocol standards for telecontrol, teleprotection, and associated telecommunications for electric utility systems, and it has created IEC 60870-5, a group of five utility-specific protocol standards. IEC 60870-5 specifies a number of links, frame, formats, and services that may be provided at each of three layers. IEC 60870-5 uses concept of a three–layer enhanced performance architecture (EPA) reference model for efficiency of implementation in devices such as RTUs, meters, relays, etc.

Additionally, IEC 60870-5 includes a user layer that is situated between the OSI application layer and the user's application program to add interoperability for such function as clock synchronization and file transfers. Coded bit-serial data transmission is used to monitor and control geographically widespread processes.

IEC 60870-5-101 (1995-11) (hereinafter referred to as 101), is a companion standard (profile) that contains definition specific to RTUs and IEDs.

IEC 60870-5-102 (1996-06) Metering

IEC 60870-5-103 (1997-12) Protection.

Standard 103 includes parts of a protection device communication protocol originally developed for use in German protective relay system and deals with the informative interface, exchanging only data that is not related to protection coordination.

References

DNP 3.0 Basic Four Documents Set

DNP V3.00 Subset Definitions

DNP3-1999 Intelligent Electronic Device (IED)

Certification Procedure SubsetLevel 2

Link: www.dnp.org

IEC 60870-5-1 (1990-02), Telecontrol Equipment and Systems – Part 5: Transmission Protocols- Section 1: Transmission frame formats.

IEC 60870-5-2 (1992-04), Telecontrol Equipment and Systems – Part 5: Transmission Protocols- Section 2: Link Transmission Procedures.

IEC 60870-5-3 (1992-09), Telecontrol Equipment and Systems – Part 5: Transmission Protocols- Section 3: General structure of Application Data.

IEC 60870-5-4 (1993-08), Telecontrol Equipment and Systems – Part 5: Transmission Protocols- Section 4: Definition and Coding of Application Information Elements.

IEC 60870-5-5 (1995-06), Telecontrol Equipment and Systems – Part 5: Transmission Protocols- Section 5: Basic Application Functions.

IEC 60870-5-101 (1995-11), Telecontrol Equipment and Systems – Part 5: Transmission Protocols- Section 101: Companion Standard for Basic Telecontrol Task.

Regards

Sherwin:beer:

DNP3 and IEC 60870-5

BillRobinson

Member

Maj. Toxido

Member

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