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1、DRAFT FOR DEVELOPMENT DD ENV 1805-2:1996 Data communication for HVAC Application Management Net Part 2: System neutral data transmission by open communication for building automation (FND) ICS 35.240.60; 97.120 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:
2、48:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD ENV 1805-2:1996 This Draft for Development, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1996 BSI 03-2000 The following BSI refe
3、rences relate to the work on this Draft for Development: Committee reference RHE/16/1 ISBN 0 580 25357 0 Committees responsible for this Draft for Development The preparation of this Draft for Development was entrusted by Technical Committee RHE/16, Controls for HVAC, to Subcommittee RHE/16/1, Manag
4、ement systems for buildings, upon which the following bodies were represented: Association of Consulting Engineers Association of Control Manufacturers TACMA (BEAMA Ltd.) British Combustion Equipment Manufacturers Association Building Services Research and Information Association Department of the E
5、nvironment (Building Research Establishment) Electrical Contractors Association Energy Systems Trade Associations HEVAC Association Co-opted members Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:48:22
6、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD ENV 1805-2:1996 BSI 03-2000i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of ENV 1805-25 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:48:22 GMT+00:00 2006, Uncontro
7、lled Copy, (c) BSI DD ENV 1805-2:1996 ii BSI 03-2000 National foreword This Draft for Development has been prepared by Subcommittee RHE/16/1 and is the English language version of ENV 1805 Data communication for HVAC application management net Part 2:1995 System neutral data transmission by open com
8、munication for building automation (FND), published by the European Committee for Standardization (CEN). ENV 1805-2:1995 was produced as a result of international discussions in which the UK took an active part. This publication is not to be regarded as a British Standard. It is being issued in the
9、Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis so that information and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience
10、 can be reported to the European organization responsible for its conversion to a European Standard. A review of this publication will be initiated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its three-year life. The commence
11、ment of the review will be notified by an announcement in BSI News. According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European Standard, to extend the life of the prestandard or to withdraw it. Commen
12、ts should be sent in writing to the Secretary of BSI Technical Committee RHE/16 at 389 Chiswick High Road, London W4 4AL giving the document reference and clause number and proposing, where possible, and appropriate revision of the text. Cross-reference Publication referred toCorresponding British S
13、tandard ISO 4903:1989BS ISO 4903:1989 Information technology. Data communication. 15-pole DTE/DCE interface connector and contact number assignments Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ENV title page, pages 2 to 76, an inside back cover
14、and a back cover. 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: London South Bank University, London South Bank University, Sat Dec 09 03:48:22 GMT+00:00 2006, Unco
15、ntrolled Copy, (c) BSI EUROPEAN PRESTANDARD PRENORME EUROPENNE EUROPISCHE VORNORM ENV 1805-2 July 1995 ICS 35.240.60; 97.120 Descriptors: Automation, buildings, control device, data processing, data transfer, FND English version Data Communication for HVAC Application Management Net Part 2: System n
16、eutral data transmission by open communication for building automation (FND) This European Prestandard (ENV) was approved by CEN on 1995-06-29 as a prospective standard for provisional application. The period of validity of this ENV is limited initially to three years. After two years the members of
17、 CEN will be requested to submit their comments, particularly on the question whether the ENV can be converted into an European Standard (EN). CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly at national level in an ap
18、propriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final decision about the possible conversion of the ENV into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Gr
19、eece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All rights o
20、f reproduction and communication in any form and by any means reserved in all countries to CEN and its members. Ref. No. ENV 1805-2:1995 E Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:48:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 1805-2:1995 BSI 03-
21、2000 2 Foreword This European prestandard (ENV) has been prepared by the Technical Committee CEN TC 247, Control for mechanical building service, of which the secretariat is held by SNV. This ENV 1805-2 prestandard is part of a series of standards for system-neutral data communications in HVAC syste
22、ms. This ENV 1805-2 (FND) prestandard and the ENV 1805-1 (BACnet) cover the data communications on the management level and together form the prestandard for the management level. ENV 1805-2 is an adoption of the German prestandard DIN V 32735 “System-neutral data transmission by open communication
23、for building automation (FND)” from January 1991. The position of this standard in the whole range of standards for mechanical building services and the normative sections of the BACnet standard included is illustrated in Figure 1. According to the CEN/CENELEC Internal Regulations, the following cou
24、ntries are bound to announce the European Prestandard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Protugal, Spain, Sweden, Switzerland, United Kingdom. Figure 1 The shaded boxes indicate the contents and the hierarchy of thi
25、s standard. The plain areas show the positioning of this standard in relationship to other relevant mechanical building services standards Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:48:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 1805-2:1995 BSI 03-
26、20003 Contents Page Foreword2 0Introduction5 1Scope5 1.1Field of application5 1.2Purpose5 2Normative references6 3FND communication model6 3.1Information exchange6 3.2Positioning of FND inside building automation systems8 3.3FND building automation model9 3.4Data points11 3.5Definitions12 4Descripti
27、on of data points14 4.1Transfer point14 4.2Signalling point15 4.3Switching point (with and without feedback)18 4.4Measuring point21 4.5Set point26 4.6Counting point28 4.7Collection point32 5FND-APDU format37 5.1Survey37 5.2Data point status41 6Operational description42 6.1Commands42 6.2Messages45 6.
28、3Disabling event messages47 6.4Access control48 7Segmentation51 8Communication process52 8.1General52 8.2invoke_id53 8.3dp_busy53 8.4Procedural specification54 8.5REJECT/ERROR conditions57 9Conformity assessment59 9.1Testing of an FND island control station interface59 9.2Testing of an FND control s
29、tation interface62 Annex A (informative) Authentication68 Page Annex B (normative) Binary attributes and physical dimensions68 Annex C (informative) Network interface74 Annex D (normative) REJECT and ERROR codes75 D.1REJECT Coding75 D.2ERROR codes75 D.3Info-code in case of commands75 D.4Info-code in
30、 case of messages75 Figure 1 FND communication model7 Figure 2 X.21 plug according to ISO 4903:19898 Figure 3 Positioning of the FND9 Figure 4 Addressing scheme FND10 Figure 5 Dialogue sequence CS-IS-DP11 Figure 6 FND in the ISO layer model12 Figure 7 info_event16 Figure 8 info_event19 Figure 9 info
31、_event22 Figure 10 update_control24 Figure 11 info_event27 Figure 12 info_event29 Figure 13 update_control31 Figure 14 info_event34 Figure 15 FND-APDU format37 Figure 1641 Figure 17 Clarification of the modification authorization by the CS50 Figure 18 Clarification of the modification authorization
32、by the island51 Figure 19 Sending and receiving pools54 Figure 20 Procedure for Cmd/Usm send request55 Figure 21 Procedure for Cmd/Usm indication of receipt56 Figure 22 REJECT/ERROR sequences57 Figure 23 REJECT/ERROR sequences58 Figure 24 ERROR APDU format59 Figure 25 Testing procedure for an island
33、 control station interface65 Figure 26 Island control station interfaces during testing66 Figure 27 Testing procedure for a central control station interface66 Figure 28 Testing procedure for a central control station interface67 Licensed Copy: London South Bank University, London South Bank Univers
34、ity, Sat Dec 09 03:48:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 1805-2:1995 4 BSI 03-2000 Page Figure C.1 Decoupling of ATC from transportation system by NAC74 Table 18 Table 212 Table 315 Table 4 DP_015 Table 5 DP_115 Table 6 Parameter survey16 Table 717 Table 8 Operation survey18 Table 9 S
35、ymbol explanation18 Table 10 DP_018 Table 11 DP_118 Table 12 Parameter survey20 Table 13 Parameter survey20 Table 14 Operation survey21 Table 15 Symbol explanation21 Table 16 DP_021 Table 17 DP_121 Table 18 DP_222 Table 19 Admissible combinations in case of requests23 Table 20 Admissible combination
36、s in case of spontaneous messages (X = 0 or 1)23 Table 21 Parameter survey23 Table 2224 Table 23 Parameter survey25 Table 24 Operation survey25 Table 25 Symbol explanation26 Table 26 DP_026 Table 27 DP_126 Table 28 Parameter survey27 Table 29 Parameter survey27 Table 30 Operation survey27 Table 31 S
37、ymbol explanation28 Table 32 DP_028 Table 33 DP_128 Table 34 DP_228 Table 3530 Table 36 Parameter survey30 Table 37 Parameter survey31 Table 38 Operation survey31 Table 39 Symbol explanation32 Table 40 DP_032 Table 41 DP_133 Page Table 42 DP_233 Table 43 Parameter survey34 Table 44 Parameter survey3
38、6 Table 45 Operation survey36 Table 46 Symbol explanation36 Table 4738 Table 4838 Table 4939 Table 5039 Table 51 Cmd frame42 Table 52 Syntax of the operation code for commands42 Table 53 Coding43 Table 54 Coding43 Table 5543 Table 5644 Table 57 DP_244 Table 5845 Table 59 Syntax of the operation code
39、 for messages46 Table 6046 Table 6147 Table 62 Coding48 Table 63 Cmd frame48 Table 6450 Table B.1 Coding of binary attributes69 Table B.2 Coding of physical dimensions71 Table C.174 Table D.175 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:48:22 GMT+00:00 2
40、006, Uncontrolled Copy, (c) BSI ENV 1805-2:1995 BSI 03-20005 0 Introduction The FND is a communication protocol for building automation and control systems on the management net level. It is used for data transmission between a central station and one or more autonomous islands of automation station
41、s. FND means vendor-independent and system-neutral data transmission. The FND standard specifies the hardware, the software, the behaviour and the functionality of the interfaces provided by the central station and the corresponding island of automation stations. The protocol definition is based on
42、the ISO/OSI Basic Reference Model. The FND protocol stack uses the layers 1 to 3 and layer 7. The lower layers are identical to the International Standard CCITT X.21/X.25. Because of this WAN communication via public networks is possible. The realisation of the communication linkbetween the stations
43、 is a kind of a local matter. The network can be any kind of LAN, WAN or even a point to point connection providing the FND interface. The layer 7 contains the FND protocol. Using the communication objects specified all basic functions in building automation and control systems can be handled, i.e.
44、read and command analogue and digital datapoints and values, change limits of analogue datapoints and alarm handling. The main communication objects of layer 7 are: Signalling point (digital input) Switching point (digital output) Measuring point (analogue input) Positioning point (analogue output)
45、Counting point For error handling, authentication and transparent data transmission (e.g. files) additional objects are specified in the standard. The communication initiated by the central station uses the FND layer 7 services command and response. The command service can contain a request for a va
46、lue, a value for setting a datapoint etc. The automation station sends a response either with or without an information depending on the previous command. If the automation station initiates the communication, the services unsolicited message and acknowledge are used. In that case something had happ
47、ened in the automation island, e.g. a change of state, an alarm, that has to be reported to the central station. The unsolicited message is sent and the central station responds with an acknowledge. So, every communication between the automation systems uses a handshake procedure. 1 Scope 1.1 Field
48、of application The FND is a communication protocol for building automation and control systems on the management net level. It is used for data transmission between a central station and one or more autonomous islands of automation stations. The standard specifies the interface of the central statio
49、n and of the island of automation stations for communicating with each other. The network used for internetworking these systems is not part of this standard. The communication objects defined in this standard correspond to the basic functions of building automation and control systems. Therefore the information needed by the central station is available from automation stations even if the vendor