1、 IEC TR 62541-1 Edition 2.0 2016-10 TECHNICAL REPORT OPC unified architecture Part 1: Overview and concepts IEC TR 62541-1:2016-10(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this public
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10、ck on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC TR 62541-1 Edition 2.0 2016-10 TECHNICAL REPORT OPC unified architecture Part 1: Overview and concepts INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 25.040.40; 35.100.01 ISBN 978-2-8322-3640
11、-6 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC TR 62541-1:2016 IEC 2016 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Terms, definitions and abbreviations
12、 6 3.1 Terms and definitions 6 3.2 Abbreviations 10 4 Structure of the OPC UA series 10 4.1 Specification organization 10 4.2 Core specification parts . 11 4.3 Access Type specification parts . 12 4.4 Utility specification parts 12 5 IEC 62541 standards Overview . 13 5.1 UA scope 13 5.2 General . 13
13、 5.3 Design goals . 13 5.4 Integrated models and services . 15 5.4.1 Security model . 15 5.4.2 Integrated AddressSpace model . 16 5.4.3 Integrated object model 16 5.4.4 Integrated services . 17 5.5 Sessions . 17 5.6 Redundancy 17 6 Systems concepts 17 6.1 Overview. 17 6.2 OPC UA Clients 18 6.3 OPC U
14、A Servers . 19 6.3.1 General 19 6.3.2 Real objects . 19 6.3.3 OPC UA Server application 19 6.3.4 OPC UA AddressSpace 20 6.3.5 Publisher/subscriber entities . 20 6.3.6 OPC UA Service Interface 20 6.3.7 Server to Server interactions 21 7 Service Sets 22 7.1 General . 22 7.2 Discovery Service Set . 22
15、7.3 SecureChannel Service Set . 22 7.4 Session Service Set 23 7.5 NodeManagement Service Set . 23 7.6 View Service Set . 24 7.7 Query Service Set . 24 7.8 Attribute Service Set . 24 7.9 Method Service Set . 24 7.10 MonitoredItem Service Set 24 7.11 Subscription Service Set . 25 Bibliography . 26 IEC
16、 TR 62541-1:2016 IEC 2016 3 Figure 1 OPC UA Specification organization . 11 Figure 2 OPC UA Target applications . 14 Figure 3 OPC UA System architecture 18 Figure 4 OPC UA Client architecture 18 Figure 5 OPC UA Server architecture . 19 Figure 6 Peer-to-peer interactions between Servers 21 Figure 7 C
17、hained Server example 22 Figure 8 SecureChannel and Session Services . 23 4 IEC TR 62541-1:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPC UNIFIED ARCHITECTURE Part 1: Overview and concepts FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for
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27、on 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
28、shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that whic
29、h is normally published as an International Standard, for example “state of the art“. IEC TR 62541-1, which is a technical report, has been prepared by subcommittee 65E: Devices and integration in enterprise systems, of IEC technical committee 65: Industrial- process measurement, control and automat
30、ion. The text of this technical report is based on the following documents: Enquiry draft Report on voting 65E/414/DTR 65E/463/RVC Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. IEC TR 62541-1:2016 IEC 2016
31、5 This second edition cancels and replaces the first edition of IEC TR 62541-1, published in 2010. This edition includes no technical changes with respect to the previous edition but includes updates to reflect changes or additions in normative parts of IEC 62541. This publication has been drafted i
32、n accordance with the ISO/IEC Directives, Part 2. Throughout this document and the referenced other parts of the series, certain document conventions are used: Italics are used to denote a defined term or definition that appears in the “Terms and definition” clause in one of the parts of the series.
33、 Italics are also used to denote the name of a service input or output parameter or the name of a structure or element of a structure that are usually defined in tables. The italicized terms and names are also often written in camel-case (the practice of writing compound words or phrases in which th
34、e elements are joined without spaces, with each elements initial letter capitalized within the compound). For example the defined term is AddressSpace instead of Address Space. This makes it easier to understand that there is a single definition for AddressSpace, not separate definitions for Address
35、 and Space. A list of all parts of the IEC 62541 series, published under the general title OPC Unified Architecture, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “htt
36、p:/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. IMPORTANT The colour inside logo on the cover page of t
37、his publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 6 IEC TR 62541-1:2016 IEC 2016 OPC UNIFIED ARCHITECTURE Part 1: Overview and concepts 1 Scope This pa
38、rt of IEC 62541, which is a Technical Report, presents the concepts and overview of the OPC Unified Architecture (OPC UA). Reading this document is helpful to understand the remaining parts of this multi-part document set. Each of the other parts is briefly explained along with a suggested reading o
39、rder. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any
40、 amendments) applies. IEC TR 62541-2, OPC Unified Architecture Part 2: Security Model IEC 62541-3, OPC unified architecture Part 3: Address Space Model IEC 62541-4, OPC Unified Architecture Part 4: Services IEC 62541-5, OPC Unified Architecture Part 5: Information Model IEC 62541-6, OPC unified arch
41、itecture Part 6: Mappings IEC 62541-7, OPC unified architecture Part 7: Profiles IEC 62541-8, OPC Unified Architecture Part 8: Data Access IEC 62541-9, OPC Unified Architecture Part 9: Alarms and Conditions IEC 62541-10, OPC Unified Architecture Part 10: Programs IEC 62541-11, OPC Unified Architectu
42、re Part 11: Historical Access IEC 62541-13, OPC Unified Architecture Part 13: Aggregates 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 AddressSpace collection of information that an OPC UA Server m
43、akes visible to its Clients Note 1 to entry: See IEC 62541-3 for a description of the contents and structure of the Server AddressSpace. IEC TR 62541-1:2016 IEC 2016 7 3.1.2 Aggregate a function that calculates derived values from Raw data Note 1 to entry: Raw data may be from a historian or buffere
44、d real time data. Common Aggregates include averages over a given time range, minimum over a time range and maximum over a time range. 3.1.3 Alarm type of Event associated with a state condition that typically requires acknowledgement Note 1 to entry: See IEC 62541-9 for a description of Alarms. 3.1
45、.4 Attribute primitive characteristic of a Node Note 1 to entry: All Attributes are defined by OPC UA, and may not be defined by Clients or Servers. Attributes are the only elements in the AddressSpace permitted to have data values. 3.1.5 Certificate digitally signed data structure that describes ca
46、pabilities of a Client or Server 3.1.6 Client software application that sends Messages to OPC UA Servers conforming to the Services specified in the IEC 62541 series of standards 3.1.7 Condition generic term that is an extension to an Event Note 1 to entry: A Condition represents the conditions of a
47、 system or one of its components and always exists in some state. 3.1.8 Communication Stack layered set of software modules between the application and the hardware that provides various functions to encode, encrypt and format a Message for sending, and to decode, decrypt and unpack a Message that w
48、as received 3.1.9 Complex Data data that is composed of elements of more than one primitive data type, such as a structure 3.1.10 Discovery process by which OPC UA Client obtains information about OPC UA Servers, including endpoint and security information 3.1.11 Event generic term used to describe
49、an occurrence of some significance within a system or system component 3.1.12 EventNotifier special Attribute of a Node that signifies that a Client may subscribe to that particular Node to receive Notifications of Event occurrences 8 IEC TR 62541-1:2016 IEC 2016 3.1.13 Information Model organizational framework that defines, characterizes and relates information resources of a given system or set of systems Note 1 to entry: The core address space model support
