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1、BRITISH STANDARD BS EN 60870-5-4:1994 IEC 870-5-4: 1993 Telecontrol equipment and systems Part 5: Transmission protocols Section 5.4 Definition and coding of application information elements The European Standard EN 60870-5-4:1993 has the status of a British Standard UDC 621.398:681.3.04 Licensed Co
2、py: sheffieldun sheffieldun, na, Thu Nov 09 08:37:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60870-5-4:1994 This British Standard, having been prepared under the direction of the Power Electrical Engineering Standards Policy Committee, was published under the authority of the Standards Boar
3、d and comes into effect on 15 February 1994 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference PEL/89 Draft for comment 89/27228 DC ISBN 0 580 22941 6 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under
4、 whose supervision this European Standard was prepared, comprises the national committees of the following countries: AustriaItaly BelgiumLuxembourg DenmarkNetherlands FinlandNorway FrancePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication
5、Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:37:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60870-5-4:1994 BSI 08-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 60870-5-43 National annex NA (informati
6、ve) Committees responsibleInside back cover National annex NB (informative) Cross-referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:37:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60870-5-4:1994 ii BSI 08-1999 National foreword This British Standard has bee
7、n prepared under the direction of the Power Electrical Engineering Standards Policy Committee and is the English language version of EN 60870-5-4:1993 Telecontrol equipment and systems Part 5: Transmission protocols Section 4: Definition and coding of application information elements, published by t
8、he European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 870-5-4:1993 published by the International Electrotechnical Commission (IEC). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are resp
9、onsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 20, an inside back cover and a back cover.
10、 This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:37:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME E
11、UROPENNE EUROPISCHE NORM EN 60870-5-4 November 1993 UDC 621.398:681.3.04 Descriptors: Teleprocessing, telecontrol, data transmission, data processing, protocol, data, codifications English version Telecontrol equipment and systems Part 5: Transmission protocols Section 4: Definition and coding of ap
12、plication information elements (IEC 870-5-4:1993) Matriels et systmes de tlconduite Partie 5: Protocoles de transmissions Section 4: Dfinition et codages des lments dinformation dapplication (CEI 870-5-4:1993) Fernwirkeinrichtungen und Fernwirksysteme Teil 5: Ubertragungsprotokolle Hauptabschnitt 4:
13、 Definition und Codierung von Informationselementen der Anwendungsschicht (IEC 870-5-4:1993) This European Standard was approved by CENELEC on 1993-09-22. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th
14、e 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, Ge
15、rman). 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, Denmar
16、k, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechni
17、sche Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN 60870-5-4:1993 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:37:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60870-5-4:1993 BSI 08-1999 2 Foreword The text o
18、f document 57(CO)62, as prepared by IEC Technical Committee No. 57 “Telecontrol, teleprotection and associated telecommunications for electric power systems”, was submitted to the IEC-CENELEC parallel vote in June 1992. The reference document was approved by CENELEC as EN 60870-5-4 on 22 September 1
19、993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Contents Page Foreword2 Introduction3 1Scope and object3 2Normative references3 3Definitions3 4Declaration rules for information elements4 4.1Data types4
20、 4.2Data size4 4.3Bit position4 4.4Values and codes5 4.5Assignment of function symbols and functions5 4.6Identifiers of data field sequences5 4.7Variable field size6 4.8Repetitive data fields6 4.9Logical combinations of data fields6 4.10 Packing and order of transport of data field 6 5Standard infor
21、mation elements6 5.1Type 1: UNSIGNED INTEGER (UI)6 5.2Type 2: INTEGER (I)7 5.3Type 3: UNSIGNED FIXED POINT NUMBER (UF)7 5.4Type 4: FIXED POINT NUMBEr (F)7 5.5Type 5: REAL (R)8 5.6Type 6: BITSTRING (BS)8 5.7Type 7: OCTETSTRING (OS)8 6Set of information elements8 6.1Type 1: UNSIGNED INTEGER (UI)8 6.2T
22、ype 2: INTEGER (I)10 6.3Type 3: UNSIGNED FIXED POINT NUMBER (UF)10 6.4Type 4: FIXED POINT NUMBER (F)11 6.5Type 5: REAL (R)12 6.6Type 6: BITSTRING (BS)12 6.7Type 7: OCTETSTRING (OS)13 6.8COMPOUND INFORMATION ELEMENTS (CP)13 Annex ZA (normative) Other international publications quoted in this standard
23、 with the references of the relevant European publications20 Table 1 Data types4 Table 2 Bit positions4 latest date of publication of an identical national standard(dop) 1994-08-01 latest date of withdrawal of conflicting national standards(dow) 1994-08-01 Licensed Copy: sheffieldun sheffieldun, na,
24、 Thu Nov 09 08:37:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60870-5-4:1993 BSI 08-19993 Introduction This section of IEC 870-5 defines standard declaration rules for application data in telecontrol systems. 1 Scope and object This section of IEC 870-5 applies to telecontrol equipment and syst
25、ems with coded bit serial data transmission for monitoring and controlling geographically widespread processes. This section of IEC 870-5 gives rules for defining information elements and presents a set of information elements, in particular of digital and analog process variables, that are frequent
26、ly used in telecontrol applications. Clause 4 presents syntactic rules for defining application specific information elements. These rules comprise methods for semantic declarations, that is assignments of the functional interpretation of the defined information fields. Clause 5 applies the declarat
27、ion method to the basic data types defined in Clause 4 and introduces particular subtypes of data. Clause 6 presents a set of information elements that are frequently used in telecontrol applications. These elements and the mentioned recommended applications for these elements are recommendations on
28、ly. Definitive declarations of information elements have to be fixed in application profiles. Single information elements, sequences or combinations of information elements may form an information object that is identified by an object address and by an object structures specification described in I
29、EC 870-5-3. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 870-5. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parti
30、es to agreements based on this section of IEC 870-5 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 50(371):1984, International Ele
31、ctrotechnical Vocabulary (IEV) Chapter 371: Telecontrol. IEC 870-1-1:1988, Telecontrol equipment and systems Part 1: General considerations Section 1: General principles. IEC 870-1-3:1990, Telecontrol equipment and systems Part 1: General considerations Section 3: Glossary. IEC 870-5-3:1992, Telecon
32、trol equipment and systems Part 5: Transmission protocols Section 3: General structure of application data. ISO/IEC 10000-1:1990, Information technology Framework and taxonomy of international standardized profiles Part 1: Framework. IEEE Standard 754, 1985. CCITT Recommendation V.3:1972, Internatio
33、nal Alphabet No. 5. 3 Definitions For the purpose of this section of IEC 870-5, the following definitions apply: 3.1 data type defined method of data presentation for example: data type INTEGER for whole numbers or data type OCTETSTRING for an assembly of octets 3.2 data size field length of a speci
34、fied data type in bits Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:37:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60870-5-4:1993 4 BSI 08-1999 3.3 information element a well defined variable quantity which is indivisible for example: measured value or double-point information 3.4
35、profile a set of one or more base standards, and, where applicable, the identification of chosen classes, subsets, options and parameters of those base standards, necessary for accomplishing a particular function (see 3.1.2 of ISO/IEC 10000-1) 4 Declaration rules for information elements Information
36、 elements are defined by the following syntactic and semantic declaration method: The assignment symbol “3” is used to associate information field declarations to the name of information elements and to associate functions to field declarations. 4.1 Data types Table 1 Data types 4.2 Data size The da
37、ta size i, noted directly after the symbol of the data type notation, is a cardinal number that specifies the length of a data field in bits. 4.3 Bit position The bit position of a specified field of data size i is denoted in square brackets p1pn, where p1 and pn denote the first and the last bits o
38、f the field. The order of bits is shown in the following scheme: Table 2 Bit positions For example, if a BITSTRING of size 6 occupies the field surrounded with thick lines in Table 2, then it is denoted as BS6712. The last bit of a field of size i that begins in bit position p1 is given by pn= p1+ i
39、 1. If the field size is 1, then the position is denoted by a single notation p1 in the brackets. Data typeData sizeBit positionValues and code Function Name of information element 3TYPEip1p1+ i 1 3 Function Type number Data typesSymbolMeaning 1 2 3 4 5 6 7 UNSIGNED INTEGER INTEGER UNSIGNED FIXED PO
40、INT FIXED POINT REAL BITSTRING OCTETSTRING UI I UF F R BS OS Positive whole number Positive or negative whole number Positive fixed point number Positive or negative fixed point number Positive or negative floating-point number Assembly of independent bitsa Assembly of octets a The data type BOOLEAN
41、 is a BITSTRING of size 1. OctetsBits 187654321 2161514131211109 . . . . . . . . . . . . . . . . . . j8j8j - 18j - 28j - 38j - 48j - 58j - 68j - 7 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:37:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60870-5-4:1993 BSI 08-19995 4.4 Values and
42、codes If applicable, a selected range and a selected code of values of the declared data field is denoted within angle brackets: . In general this is declared by the range of admitted values and by a term that identifies the used code. Terms that identify codes are: binary code (BIN), binary coded d
43、ecimal (BCD), Gray-code, k-of-n code, ASCII-code, etc. The default code declaration is the binary code, that is, if no terms are used to characterize the code, then given values of the data field are interpreted as binary values. If the data type is a number (INTEGER, FIXED POINT or REAL), then the
44、code is unambiguously defined by the notation of the range of numbers and by the used code: . For example, a counter that enumerates the days of the week uses an UNSIGNED INTEGER declaration with size 3 (UI3) followed by the declaration of code and range of values: , or shorter: . Individual values
45、are declared as (e.g. or for wednesday in this example). In case of the data type OCTETSTRING, a defined 8 bit character code such as e.g. the 8 bit ASCII character set is selected by the code declaration: . In this case the set of values is defined by the International Alphabet No. 5 of CCITT recom
46、mendation V.3, so that this code declaration suffices. 4.5 Assignment of function symbols and functions The functional purpose of a specified data field is declared by using the assignment symbol “3” data type i p1pi 3 function Acronyms have to be introduced by full text descriptions and by using th
47、e equivalence symbol “=”. function = FCT For example: error = ER 3 BS18 means that an error bit with the acronym ER is located in a BITSTRING of size 1 in bit position 8 of a data field. 4.6 Identifiers of data field sequences If an information element is composed of different data fields, then it i
48、s either declared as a COMPOUND or as a SEQUENCE data field. NOTESequences are used in data fields with repeated information elements. COMPOUND data fields are declared by listing individual data fields separated by commas or listed in a column, within curly brackets. A following list declares the d
49、ata types, the sizes, the bit allocations and the functional purposes of the individual data fields. The first declared data field begins with bit position 1, the other fields use successive bit allocations: SEQUENCE data fields are declared as compound data fields, however each data field begins with bit allocation 1: Field sequenceSymbolMeaning COMPOUND SEQUENCE CP SQ Sequence of data fields with successive bit allocations Sequence of data fields with bit allocations beginning with 1 per data field Licensed Copy