Energy management system application program interface (EMS-API) - Part 404: High Speed Data Access (HSDA)

Specifies a generalized interface for efficient exchange of data. Takes into account the latencies caused by a local area network providing efficient data exchange also over local area networks.

Schnittstelle für Anwendungsprogramme für Energiemanagementsysteme (EMS-API) - Teil 404: Hochgeschwindigkeitsdatenzugang (HSDA)

Interface de programmation d'application pour système de gestion d'énergie (EMS-API) - Partie 404: Accès aux données haute vitesse (HSDA)

Aplikacijski programski vmesnik za sistem upravljanja z energijo (EMS-API) - 404. del: Specifikacija vmesnika komponent (CIS) - Visokohitrostni podatkovni dostop (IEC 61970-404:2007)

General Information

Status
Withdrawn
Publication Date
27-Sep-2007
Withdrawal Date
31-Aug-2010
Drafting Committee
IEC/TC 57 - IEC_TC_57
Parallel Committee
IEC/TC 57 - IEC_TC_57
Current Stage
9960 - Withdrawal effective - Withdrawal
Start Date
22-Oct-2013
Completion Date
22-Oct-2013

Relations

Effective Date
03-Feb-2026
Effective Date
03-Feb-2026
Effective Date
03-Feb-2026
Effective Date
03-Feb-2026
Effective Date
03-Feb-2026
Standard

EN 61970-404:2008 - BARVE

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24 pages
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Frequently Asked Questions

EN 61970-404:2007 is a standard published by CLC. Its full title is "Energy management system application program interface (EMS-API) - Part 404: High Speed Data Access (HSDA)". This standard covers: Specifies a generalized interface for efficient exchange of data. Takes into account the latencies caused by a local area network providing efficient data exchange also over local area networks.

Specifies a generalized interface for efficient exchange of data. Takes into account the latencies caused by a local area network providing efficient data exchange also over local area networks.

EN 61970-404:2007 is classified under the following ICS (International Classification for Standards) categories: 33.200 - Telecontrol. Telemetering. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 61970-404:2007 has the following relationships with other standards: It is inter standard links to EN 61970-301:2004, CLC/TS 61970-2:2005, EN 61970-1:2006, EN 62361-2:2013, EN 61970-402:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 61970-404:2007 is associated with the following European legislation: Standardization Mandates: M/490. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

EN 61970-404:2007 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-januar-2008
Aplikacijski programski vmesnik za sistem upravljanja z energijo (EMS-API) - 404.
del: Specifikacija vmesnika komponent (CIS) - Visokohitrostni podatkovni dostop
(IEC 61970-404:2007)
Energy management system application program interface (EMS-API) -- Part 404: High
Speed Data Access (HSDA)
Schnittstelle für Anwendungsprogramme für Energiemanagementsysteme (EMS-API) --
Teil 404: Hochgeschwindigkeitsdatenzugang (HSDA)
Interface de programmation d'application pour système de gestion d'énergie (EMS-API) -
- Partie 404: Accès aux données haute vitesse (HSDA)
Ta slovenski standard je istoveten z: EN 61970-404:2007
ICS:
29.240.30 Krmilna oprema za Control equipment for electric
elektroenergetske sisteme power systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61970-404
NORME EUROPÉENNE
September 2007
EUROPÄISCHE NORM
ICS 33.200
English version
Energy management system application program interface (EMS-API) -
Part 404: High Speed Data Access (HSDA)
(IEC 61970-404:2007)
Interface de programmation d'application Schnittstelle für Anwendungsprogramme
pour système de gestion d'énergie für Energiemanagementsysteme
(EMS-API) - (EMS-API) -
Partie 404: Accès aux données Teil 404: Hochgeschwindigkeitsdatenzugang
haute vitesse (HSDA) (HSDA)
(CEI 61970-404:2007) (IEC 61970-404:2007)

This European Standard was approved by CENELEC on 2007-09-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61970-404:2007 E
Foreword
The text of document 57/887/FDIS, future edition 1 of IEC 61970-404, prepared by IEC TC 57, Power
systems management and associated information exchange, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 61970-404 on 2007-09-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61970-404:2007 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61970-404:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1) 2)
IEC 61970-1 – Energy management system application EN 61970-1 2006
program interface (EMS-API) -
Part 1: Guidelines and general requirements

1) 2)
IEC/TS 61970-2 – Energy management system application CLC/TS 61970-2 2005
program interface (EMS-API) -
Part 2: Glossary
IEC 61970-301 2003 Energy management system application EN 61970-301 2004
program interface (EMS-API) -
Part 301: Common Information Model (CIM)
Base
1)
IEC/TS 61970-401 – Energy management system application – –
program interface (EMS-API) -
Part 401: Component interface specification
(CIS) framework
3)
IEC 61970-402 – Energy management system application – –
program interface (EMS-API) -
Part 402: Component Interface Specification
(CIS) - Common services
OMG DAIS DA 2005 Data Acquisition from Industrial Systems – –
section Data Access (DAIS DA)
OMG DAF 2005 Utility Management System (UMS) Data – –
Access Facility (DAF)
OPC DA 2000 OPC Data Access Custom Interface – –
Specification
1)
Undated reference.
2)
Valid edition at date of issue.
3)
At draft stage.
IEC 61970-404
Edition 1.0 2007-08
INTERNATIONAL
STANDARD
Energy management system application program interface (EMS-API) –
Part 404: High Speed Data Access (HSDA)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
S
ICS 33.200 ISBN 2-8318-9251-1
– 2 – 61970-404 © IEC:2007(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative references .7
3 Terms, definitions and identification conventions .7
3.1 Terms and definitions .7
3.2 Conventions .7
4 CIS Specification.7
4.1 Background (informative) .7
4.2 SCADA use case (informative) .8
4.3 Data model (normative) .9
4.4 Messages (normative) .12
4.5 Interface (normative) .12
4.5.1 Objects and interfaces.12
4.5.2 Server and session interfaces.15
4.5.3 Browse interfaces.16
4.5.4 Group management interfaces.16
4.5.5 IO interfaces.17
4.5.6 Client interfaces .17
4.6 Mapping of HSDA (normative) .17

Annex A (informative) Details on SCADA use case .20

Figure 1 – Control system structure .8
Figure 2 – Data subscription .9
Figure 3 – DAIS Data Access Data Model .10
Figure 4 – Example HSDA Node and Item structure .12
Figure 5 – HSDA objects and interfaces.13
Figure 6 – Typical interaction between the HSDA objects .15
Figure A.1 – Example use cases.20
Figure A.2 – Example on/off command object .21
Figure A.3 – Command sequence .21

Table 1 – HSDA to IEC 61970-301 mapping .

61970-404 © IEC:2007(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
ENERGY MANAGEMENT SYSTEM
APPLICATION PROGRAM INTERFACE (EMS-API) –

Part 404: High Speed Data Access (HSDA)

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61970-404 has been prepared by IEC Technical Committee 57:
Power systems management and associated information exchange.
The text of this standard is based on the following documents:
FDIS Report on voting
57/887/FDIS 57/906/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
A list of all parts of the IEC 61970 series, under the general title Energy Management System
Application Program Interface (EMS-API), can be found on the IEC website.

– 4 – 61970-404 © IEC:2007(E)
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

61970-404 © IEC:2007(E) – 5 –
INTRODUCTION
This part of IEC 61970 is part of the IEC 61970 series that defines Application Program
Interfaces (APIs) for an Energy Management System (EMS). The IEC 61970-4XX and
IEC 61970-5XX series documents comprise Component Interface Specifications (CISs). The
IEC 61970-4XX series CIS are specified as Platform Independent Models (PIMs), which
means they are independent of the underlying technology used to implement them. PIM
specifications are also referred to as Level 1 specifications. The IEC 61970-5XX series CIS,
on the other hand, are specified as Platform Specific Models (PSMs). PSM specifications are
also referred to as Level 2 specifications.
IEC 61970-4XX CISs specify the functional requirements for interfaces that a component (or
application) should implement to exchange information with other components (or
applications) and/or to access publicly available data in a standard way. The component
interfaces describe the specific event types and message contents that can be used by
applications for this purpose.
IEC 61970-404 specifies an interface for the efficient transfer of data in a distributed
environment. Small amounts of data are transferred with short delay but also large amounts of
data are transferred in short time but with possibly longer delay. This is a typical requirement
for a SCADA system that acts as a real time data provider to other sub-systems. Other
systems than SCADA may also benefit from the characteristics of HSDA. When short delay
times as well as bulk data transfer is required, HSDA is a good fit.
These component interface specifications refer to entity objects for the power system domain
that is defined in the IEC 61970-3XX series, including IEC 61970-301.

– 6 – 61970-404 © IEC:2007(E)
ENERGY MANAGEMENT SYSTEM
APPLICATION PROGRAM INTERFACE (EMS-API) –

Part 404: High Speed Data Access (HSDA)

1 Scope
The IEC 61970-404 High Speed Data Access (HSDA) specification specifies a generalized
interface for efficient exchange of data. The specification takes into account the latencies
caused by a Local Area Network (LAN) providing efficient data exchange also over Local Area
Networks.
IEC 61970-404 is derived from the Object Management Group (OMG) Data Acquisition from
Industrial Systems section Data Access (DAIS DA) specification. OMG DAIS DA relies on the
OMG Data Access Facility (DAF) and OPC Data Access (DA) specifications. OMG DAIS DA is
a Platform Specific Model (PSM) with CORBA as the platform and OPC DA is a PSM with
Microsoft COM as the platform. IEC 61970-404 describes the functionality of these PSMs in a
technology independent way (i.e., as a Platform Independent Model (PIM)). Hence it explains
the functionality to a level that can be used to create additional PSMs or act as an
introduction to existing PSMs, i.e. DAIS DA and OPC DA. Implementers wanting an
introduction to OMG DAIS DA and OPC DA shall read these documents.
The HSDA interface is intended to interoperate with other IEC 61970 based interfaces.
Hence, it is possible to use information retrieved from an other interface to access the same
information using this interface, for example:
• object identifiers,
• attribute names or identifiers,
• class names or identifiers.
Subclause 4.6 provides a generic mapping for the CIM classes and attributes.
The way data is organized in a server implementing the HSDA interface can be seen by using
the browse interfaces for data and meta data. It is also possible to use the data access
interface directly without using the browse interfaces if the client has an a priori knowledge of
object, class and attribute identifiers. Object identifiers may be retrieved using data from other
interfaces, for example a CIMXML file or the IEC 61970-403 interface. Information on what
classes and attributes are available will be described in IEC 61970-45X documents, for
example SCADA data, State Estimator results etc.
IEC 61970-1 provides the EMS-API reference model upon which this standard is based. In
that reference model, the terminology used in This part of IEC 61970 is introduced and the
role of the CIS is explained.
IEC 61970-401 provides an overview and framework for the CIS (IEC 61970-4XX) standards.
The mapping of IEC 61970-404 to implementation specific technologies or PSMs is further
described in a separate series of documents, i.e. the future IEC 61970-5XX. For actual
implementations, the future IEC 61970-5XX, OMG DAIS DA, OMG DAF or OPC DA are used.

61970-404 © IEC:2007(E) – 7 –
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies:
IEC 61970-1, Energy management system application program interface (EMS-API) – Part 1:
Guidelines and general requirements.
IEC/TS 61970-2, Energy management system application program interface (EMS-API) –
Part 2: Glossary
IEC 61970-301:2005, Energy management system application program interface (EMS-API) –
Part 301: Common Information Model (CIM) base
IEC 61970-401, Energy management system application program interface (EMS-API) –
Part 401: Component Interface Specification (CIS) Framework
IEC 61970-402, Energy management system application program interface (EMS-API) –
Part 402: Component Interface Specification (CIS) – Common Services
Data Acquisition from Industrial Systems section Data Access (DAIS DA), OMG Adopted
Specification Version 1.1, formal/05-06-01 June 2005 (Referred herein as 'OMG DAIS DA')
Utility Management System (UMS) Data Access Facility (DAF), OMG Adopted Specification,
Version 2.0.1, formal/05-06-03, July 2005 (Referred to herein as ‘OMG DAF’)
OPC Data Access Custom Interface Specification, Version 2.05, OPC file:
opcda205_cust.doc, OPC Foundation, December 17, 2000 (Referred to herein as ‘OPC DA’)
3 Terms, definitions and identification conventions
3.1 Terms and definitions
For the purposes of this part of IEC 61970, the terms and definitions given in IEC/TS 61970-2
apply.
3.2 Conventions
A convention used in this document to uniquely identify a UML attribute is to concatenate the
class name and the attribute name with a period in between, for example, the attribute “id” in
the class “Node” will then be named “Node.id”. For attributes in sub structures multiple
attribute names may be used, for example “Item.id.node_id” where the “node_id” is a part in
the structure “Item.id”.
4 CIS Specification
4.1 Background (informative)
For historical reasons, control systems for different industrial processes have evolved along
different lines. Control systems for power systems have evolved on a UNIX base and control
systems for most other industrial processes have evolved on a Windows base. For Windows
based control systems, OPC has become the dominating standard. For UNIX based systems,
the DAIS API defined in Common Object Request Broker Architecture (CORBA) Interface
Definition Language (IDL) has been developed. DAIS is based on OPC to benefit from the
success of OPC and enable easy bridging to OPC. With this intent Object Management Group
(OMG) started in 1997 to develop a CORBA based interface with the same functionality as

– 8 – 61970-404 © IEC:2007(E)
OPC. HSDA has the functionality from OMG DAIS DA and OPC DA described in a technology
neutral way, hence HSDA is intended to be a Platform Independent Model (PIM).
4.2 SCADA use case (informative)
A major component in a utility operational system is a SCADA system that acts as a real time
data provider to other components or clients. Such a system typically has the following
components:
• Process instrumentation making sensor data and actuation capabilities available.
• Remote Terminal Units (RTUs), process control or substation control systems reading
sensor data and controlling actuators.
• Process communication units connecting to RTUs or substation control systems. Remote
communication is typically solved by specialized RTU or field bus protocols (e.g.
IEC 60870-5). The IEC 61850 series is a new standard for communication with and within
substations. The interfaces defined in this part of IEC 61970 can be used as a standard
API to encapsulate such communication solutions at the client side.
• SCADA subsystem making processed sensor data and control capabilities available to
operators, applications or other systems.
• An Energy Management System (EMS) using the SCADA subsystem for extended
processing and control.
• Graphical User Interfaces visualizing process data.
SCADA and EMS systems can be regarded as having a server part where data processing is
performed and a Graphical User Interface (GUI) part where visualization and command
dialogues are made. The SCADA and EMS may have common or different GUI’s. The
architecture is shown in Figure 1 below.

HSDA servers
and clients
EMS or model based
management system
Graphical user interface
Data
traffic
SCADA or
across
telemetry system
HSDA
API
Process
communication
units
Process control
substation control
or RTU
Instrumentation
IEC  1313/07
Figure 1 – Control system structure
The shaded area in Figure 1 is where it is most appropriate to use HSDA to transfer data. The
components in Figure 1 interact as follows:

61970-404 © IEC:2007(E) – 9 –
• The Process Communication Unit has an HSDA server that provides a SCADA HSDA
client with data.
• The SCADA component has an HSDA server that provides its GUI and the EMS HSDA
client with data.
• The EMS component has an HSDA server that provides its GUI with calculation results.
HSDA supports both subscription and read/write operations. The concept of subscription is
described in Figure 2.
Client
Establish
Callbacks for
subscription
data transfer
Server or
data provider
IEC  1314/07
Figure 2 – Data subscription
A subscription involves a server that publishes data and clients that subscribe to receive the
data. The server has no a priori knowledge of its clients; they become known to the server
when a client creates a subscription. Once a subscription is established, the server calls the
client back when data becomes available or is updated.
Data provided by a HSDA server can be of many kinds:
• Real-time data collected from the power system.
• Calculated data representing quantities in the power system.
• Parameters describing properties about the power system or equipment in the power
system.
• Parameters controlling the processing of real-time or calculated data.
• Controls that can be issued to the power system.
4.3 Data model (normative)
The HSDA data model describes how data seen through the HSDA interface appears to be
organized within a server. Internally, a server implementation may organize data differently,
but a client using HSDA will see a data model as shown in Figure 3. A description of how the
data model maps to IEC 61970-301 is given in 4.6.

– 10 – 61970-404 © IEC:2007(E)
00.*.*
Node
Item
id : ID
value : Simple
label : String
0.0.11
quality : Quality
pathname : String
time_stamp : DateTime
0.0.**
type_id : ID 11
pathname : String
parent_id : ID
0.0.** 0.0.**
+id
Property
ItemID
Type
id : ID
+aggregated_types node_id : ID
id : ID label : String
property_id : ID
label : String data_type : SimpleType
0.0.** 11 00.*.*
type_id : ID
IEC  1315/07
Figure 3 – DAIS Data Access Data Model
Figure 3 is a UML diagram showing the HSDA object types appearing in the interfaces:
• Type: describes the Nodes; hence Type is meta data.
• Property: describes the Items; hence Property is meta data.
• Node: describes data objects that can be accessed with HSDA. Nodes may contain o
...

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