Bsi bs en 50463 4 2012

BS EN 50463-4:2012 BSI Standards Publication Railway applications — Energy measurement on board trains Part 4: Communication NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW raising standards worldwide™ BS EN 50463-4:2012 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 50463-4:2012 Together with BS EN 50463-1:2012, BS EN 50463-2:2012, BS EN 50463-3:2012 and BS EN 50463-5:2012 it supersedes BS EN 50463:2007, which is withdrawn The UK participation in its preparation was entrusted to Technical Committee GEL/9, Railway Electrotechnical Applications A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2013 Published by BSI Standards Limited 2013 ISBN 978 580 69932 ICS 45.060.10 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2013 Amendments issued since publication Date Text affected BS EN 50463-4:2012 EN 50463-4 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM December 2012 ICS 45.060.10 Supersedes EN 50463:2007 (partially) English version Railway applications Energy measurement on board trains Part 4: Communication Applications ferroviaires Mesure d'énergie bord des trains Partie 4: Communications Bahnanwendungen Energiemessung auf Bahnfahrzeugen Teil 4: Kommunikation This European Standard was approved by CENELEC on 2012-10-15 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50463-4:2012 E BS EN 50463-4:2012 EN 50463-4:2012 -2- Contents Foreword Introduction .5 Scope .7 Normative references .7 Terms, definitions and abbreviations 3.1 Terms and definitions .8 3.2 Abbreviations 12 Requirements 14 4.1 General 14 4.2 On board communication subsystem 14 4.3 On board to ground communication subsystem 20 4.4 Access security .20 Conformity assessment .21 5.1 General 21 5.2 PICS and PIXIT 21 5.3 Design review .22 5.4 Type test procedure 22 Annex A (normative) On board to ground communication preferred solution 26 A.1 Communication services 26 A.2 EMS data transfer .30 A.3 Access security .35 Annex B (informative) VEI–VMF/CMF to ECF interface implementation example 36 B.1 General 36 B.2 Payload format .36 B.3 Encryption .37 Annex C (informative) PICS structure and instruction 38 C.1 Structure .38 C.2 Instructions for completing the PICS pro-forma 38 C.3 PICS pro-forma examples 40 Annex D (informative) Access security 43 Annex ZZ (informative) Coverage of Essential Requirements of EU Directives 44 Bibliography 45 Figures Figure – EMS functional structure and dataflow diagram .6 Figure – Example of energy index value .9 Figure – Communication interface between function/sub-function .14 Figure – EMS block diagram and interfaces .15 Figure – On board to ground communication stack 20 Figure – Test bench for on board interface 23 Figure – On board to ground test bench 24 Figure – On board to ground test bench 24 Figure A.1 – Communication components .26 Figure B.1 – Payload format 36 BS EN 50463-4:2012 -3- EN 50463-4:2012 Tables Table – List of permitted protocol stacks .16 Table A.1 – Preferred solution communication services 29 Table A.2 – Preferred solution application services .30 Table A.3 – Record format .32 Table C.1 – PICS table format .38 Table C.2 – PICS identification table 40 Table C.3 – IUA identification table 41 Table C.4 – IUA supplier identification table 41 Table C.5 – Applicable standards identification table 42 Table C.6 – Global statement table 42 Table C.7 – Level of conformity 42 BS EN 50463-4:2012 EN 50463-4:2012 -4- Foreword This document (EN 50463-4:2012) has been prepared by CLC/TC9X "Electrical and electronic applications for railways" The following dates are proposed: • • latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with this document have to be withdrawn (dop) 2013-10-15 (dow) 2015-10-15 This document (EN 50463-4:2012), together with parts 1, 2, and 5, supersedes EN 50463:2007 EN 50463-4:2012 includes the following significant technical changes with respect to EN 50463:2007:  the series is based on and supersedes EN 50463:2007;  the scope is extended, new requirements are introduced and conformity assessment arrangements are added Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s) For relationship with EU Directive 2008/57/EC amended by Commission Directive 2011/18/EU, see informative Annex ZZ, which is an integral part of this document This document is Part of the EN 50463 series which consists of the following parts, under the title Railway applications - Energy measurement on board trains: Part 1, General; Part 2, Energy measuring; Part 3, Data handling; Part 4, Communication; Part 5, Conformity assessment This series of European Standards follows the functional guidelines description in Annex A “Principles of conformity assessment” of EN ISO/IEC 17000 tailored to the Energy Measurement System (EMS) The requirements for Energy Measurement Systems in the relevant Technical Specifications for Interoperability are supported by this series of European Standards BS EN 50463-4:2012 -5- EN 50463-4:2012 Introduction The Energy Measurement System provides measurement and data suitable for billing and may also be used for energy management, e.g energy saving This series of European Standards uses the functional approach to describe the Energy Measurement System These functions are implemented in one or more physical devices The user of this series of standards is free to choose the physical implementation arrangements Structure and main contents of the EN 50463 series This series of European Standards is divided into five parts The titles and brief descriptions of each part are given below: EN 50463-1 – General The scope of EN 50463-1 is the Energy Measurement System (EMS) EN 50463-1 provides system level requirements for the complete EMS and common requirements for all devices implementing one or more functions of the EMS EN 50463-2 – Energy measuring The scope of EN 50463-2 is the Energy Measurement Function (EMF) The EMF provides measurement of the consumed and regenerated active energy of a railway traction unit If the traction unit is designed for use on a.c traction supply systems the EMF also provides measurement of reactive energy The EMF provides the measured quantities via an interface to the Data Handling System The EMF consists of the three functions: Voltage Measurement Function, Current Measurement Function and Energy Calculation Function For each of these functions, accuracy classes are specified and associated reference conditions are defined EN 50463-2 also defines all specific requirements for all functions of the EMF The Voltage Measurement Function measures the voltage of the Contact Line system and the Current Measurement Function measures the current taken from and returned to the Contact Line system These functions provide signal inputs to the Energy Calculation Function The Energy Calculation Function inputs the signals from the Current and Voltage Measurement Functions and calculates a set of values representing the consumed and regenerated energies These values are transferred to the Data Handling System and are used in the creation of Compiled Energy Billing Data The standard has been developed taking into account that in some applications the EMF may be subjected to legal metrological control All relevant metrological aspects are covered in EN 50463-2 EN 50463-2 also defines the conformity assessment of the EMF EN 50463-3 – Data handling The scope of EN 50463-3 is the Data Handling System (DHS) The on board DHS receives, produces and stores data, ready for transmission to any authorised receiver of data on board or on ground The main goal of the DHS is to produce Compiled Energy Billing Data and transfer it to an on ground Data Collection Service (DCS) The DHS can support other functionality on board or on ground with data, as long as this does not conflict with the main goal EN 50463-3 also defines the conformity assessment of the DHS EN 50463-4 – Communication The scope of EN 50463-4 is the communication services BS EN 50463-4:2012 EN 50463-4:2012 -6- This part of the EN 50463 gives requirements and guidance regarding the data communication between the functions implemented within EMS as well as between such functions and other on board units where data are exchanged using a communications protocol stack over a dedicated physical interface or a shared network It includes the on board to ground communication service and covers the requirements necessary to support data transfer between DHS and DCS EN 50463-4 also defines the conformity assessment of the communications services EN 50463-5 – Conformity assessment The scope of EN 50463-5 is the conformity assessment procedures for the EMS EN 50463-5 also covers re-verification procedures and conformity assessment in the event of the replacement of a device of the EMS EMS functional structure and dataflow Figure illustrates the functional structure of the EMS, the main sub-functions and the structure of the dataflow and is informative only Only the main interfaces required by this standard are displayed by arrows Since the communication function is distributed throughout the EMS, it has been omitted for clarity Not all interfaces are shown Time Reference Source Location Reference Source Current Measurement Function Voltage Measurement Function Energy Calculation Function Energy Measurement Function (EMF) EN 50463-2 (Energy Measuring) Data Handling System Data Handling System (DHS) EN 50463-3 (Data Handling) Data Collection Service (DCS) Energy Measurement System (EMS) EN 50463-1 (General), EN 50463-4 (Communication), EN 50463-5 (Conformity Assessment) On-board (Traction Unit) On-ground Figure – EMS functional structure and dataflow diagram BS EN 50463-4:2012 -7- EN 50463-4:2012 Scope This European Standard applies to the on board and on board to ground communication services, i.e it covers the data communication using digital interfaces: a) between functions implemented within the EMS; b) between EMS function and other on board subsystems; c) between EMS and ground communication services The on board data communication services of the EMS are covering the data exchange between functions of the EMS and the data exchange between EMS and other on board units, where data is exchanged using a communications protocol stack over a dedicated physical interface or a shared communication network The on board to ground communication services are covering the wireless data communication between the DHS and the on ground server Furthermore, this document includes conformity assessment requirements 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 amendments) applies EN 50463-1:2012, Railway applications — Energy measurement on board trains — Part 1: General EN 50463-2:2012, Railway applications — Energy measurement on board trains — Part 2: Energy measuring EN 50463-3:2012, Railway applications — Energy measurement on board trains — Part 3: Data handling EN 50463-5, Railway applications — Energy measurement on board trains — Part 5: Conformity assessment EN 60870-5 (all parts), Telecontrol equipment and systems — Part 5: Transmission protocols (IEC 60870-5 series) EN 61158-2, Industrial communication networks — Fieldbus specifications — Part 2: Physical layer specification and service definition (IEC 61158-2) IEC 61375 (all parts), Electronic railway equipment — Train communication network (TCN) ISO 11898-1:2003, Road vehicles — Controller area network (CAN) — Part 1: Data link layer and physical signalling ISO 11898-2:2003, Road vehicles — Controller area network (CAN) — Part 2: High-speed medium access unit ISO/IEC 8482, Information technology — Telecommunications and information exchange between systems — Twisted pair multipoint interconnections ISO/IEC 8825 (all parts), Information technology — ASN.1 encoding rules ISO/IEC 8802-3:2000, Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications BS EN 50463-4:2012 EN 50463-4:2012 -8- ISO/IEC 9646-1:1994, Information technology — Open Systems Interconnection — Conformance testing methodology and framework — Part 1: General concepts 1) ITU-T Recommendation V.24, List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) RFC 1035, Domain names: implementation and specification RFC 1123, Requirements for Internet Hosts – Application and Support RFC 1535, A Security Problem and Proposed Correction With Widely Deployed DNS Software RFC 2181, Clarifications to the DNS specification TIA/EIA-422-B, May 1994, Electrical Characteristics of Balanced Voltage Digital Interface Circuits Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 50463-1:2012 and the following apply NOTE When possible, the following definitions have been taken from the relevant chapters of the International Electrotechnical Vocabulary (IEV), IEC 60050 In such cases, the appropriate IEV reference is given Certain new definitions or modifications of IEV definitions have been added in this standard in order to facilitate understanding Expression of the performance of electrical and electronic measuring equipment has been taken from EN 60359 3.1.1 Board to Ground Interface BGI interface used for the communication between the train and the ground 3.1.2 consist single vehicle or group of vehicles that are not separated during normal operation; train set and rake of coaches are synonyms Note to entry: A consist may contain one or more traction units 3.1.3 consist network CN communication network interconnecting communication devices in one consist Note to entry: It is possible that more than one CN is installed in the same consist 3.1.4 Consist Network Interface CNI interface to an on board consist network used by the EMS and by other on board devices interfacing with the EMS ——————— 1) Also available as ITU-T Recommendation X.290 (04/95), OSI conformance testing methodology and framework for protocol Recommendations for ITU-T applications – General concepts BS EN 50463-4:2012 EN 50463-4:2012 - 34 - 10) When the 16–bit CRC (two 8–bit bytes) is transmitted in the message, the low-order byte will be transmitted first, followed by the high-order byte A.2.3 CEBD file structure The CEBD recorded into the memory are transmitted spontaneously to ground according to the requirements in A.1.2.6 or are transmitted on demand The file includes all the records relevant to the specified time interval expressed as time of the first TRP and time of the last TRP The records are retrieved from memory and compiled as XML file NOTE The CRC are used to assure that the XML file has no corrupted records but the CRC are not included in the XML file The integrity is assured by the immediate coding of the XML file using the TGZ compressor which applies its own integrity check The file shall have a header that includes: 1) CPID; 2) TRP duration; 3) date and time of the first record; 4) date and time of the last record; 5) identification of ECF channels pair and related traction system types; 6) date and time of compilation; 7) latitude and longitude of the location of compilation NOTE The specification at line 7) is optional and provides an information that may be used for maintenance purposes Referring to line in the list above, the traction supply system types handled by each channel shall be coded as the following: a) 01 = 25 kV a.c.; b) 02 = 15 kV a.c.; c) 03 = kV d.c.; d) 04 = 1,5 kV d.c.; e) 05 = 600 V d.c / 750 V d.c EXAMPLE In case of a 25 kV a.c and kV d.c traction system, EMS has two channels that will handle the two traction voltages and the code is 0102 or 0201 respectively if the channel A is 25 kV a.c or kV d.c The XML file is compressed in a TGZ archive NOTE Typically 80 Kbytes result in about Kbytes The TGZ archive is encrypted by means of the DES algorithm using the 64 bits key stored in the EMS by the Administrator and given under controlled procedure to the DCS Administrator The obtained file shall be transmitted using a client protocol of the following types: FTP, FTPS, HTTP or HTTPS A.2.4 Transferred data file XML schema According to the record structure that is specified in A.2.1, the CEBD transferred data file is structured as specified in the following XML schema BS EN 50463-4:2012 - 35 - A.3 Access security The access security is specified in 4.4 and a proposal is given in Annex D EN 50463-4:2012 BS EN 50463-4:2012 EN 50463-4:2012 - 36 - Annex B (informative) VEI–VMF/CMF to ECF interface implementation example B.1 General This informative annex aims to present an implementation example for the application data exchanged through the VMF/CMF to the ECF interface (VEI) This interface transfers digital values that are obtained by conversion and processing of the analogue input values applied to the VMF/CMF inputs The format of these digital values and the format of the payload to be transferred are described by the following informative clauses The security is assured by a procedure that bounds the VMF/CMF (the slave unit) to the ECF (the master unit) All digital values obtained by conversion of the voltage and current applied to the input of the VMF/CMF unit use format specified in ISO/IEC 8825 B.2 Payload format The Payload format is the format of the useful data that are contained inside the frame that is periodically transmitted by the sensor unit to the handling unit and that contains the data values to be used to calculate the electric energy taken from or returned (during regenerative braking) to the contact line by the traction unit Furthermore, the payload contains the ancillary information necessary to assure the integrity and the authenticity The format of payload may be as depicted in Figure B.1 Header CkCnt DC Voltage DC Current AppCRC Header CkCnt AC Voltage AC Current AppCRC Figure B.1 – Payload format Header: bits that represent the Sensor unit identification CkCnt: bits representing the Check variable and the sequence counter The format of this word is the following: CTN3 CTN2 CTN1 CTN0 CK22 CK21 CK12 CK11 CNT3-CNT0: it is a 4-digit free running counter to be used by the Data Handling unit to check that the frames are received in correct sequence CK22-CK21: it is a two bits check variable that is related to the AC or DC Voltage value and indicates the validity according to this table: 00 = Not valid, 01 = AC valid, 10 = DC valid, 11 = error CK12-CK11: it is a two bits check variable that is related to the AC or DC Current value and indicates the validity according to this table: 00 = Not valid, 01 = AC valid, 10 = DC valid, 11 = error DC Voltage: 16 bits encoded as UNSIGNED16 It represents the converted values of the DC contact line voltage The validity of this value is defined by the relevant Check Variable DC Current: 16 bits encoded as INTEGER16 It represents the converted values of the DC contact line absorbed or returned current The validity of this value is defined by the relevant Check Variable AC Voltage: 16 bits encoded as INTEGER16 It represents the converted values of the AC contact line voltage The validity of this value is defined by the relevant Check Variable BS EN 50463-4:2012 - 37 - EN 50463-4:2012 AC Current: 16 bits encoded as INTEGER16 It represents the converted values of the AC contact line absorbed or returned current The validity of this value is defined by the relevant Check Variable AppCRC: it is a CRC8 that is calculated on the complete payload It is used to check integrity at application level B.3 Encryption The payload prior to be transmitted may be encrypted to enhance security, the decryption key given to the VMF/CMF by the ECF unit during the Bounding Procedure or is embedded in the ECF software during the commissioning BS EN 50463-4:2012 EN 50463-4:2012 - 38 - Annex C (informative) PICS structure and instruction C.1 Structure PICS pro-forma is a set of tables containing questions, to be answered by an implementer, and limitations on the possible answers It contains two types of questions: • questions to be answered by either "YES" or "NO", related to whether a clause (ranging from a macroscopic functional unit to a microscopic one) has been implemented or not The allowed answers, which reflect the base specification, are documented in the PICS as requirement; the answers constitute the support; • questions on numerical values implemented (for timers, for sizes of messages, for frequencies, etc.) The legitimate range of variation of this value, which reflects the base specification, is given in the relevant part of EN 50463 The answers constitute the supported values C.2 Instructions for completing the PICS pro-forma C.2.1 PICS table structure PICS are organised in tables Columns in the tables are • Ref.: It is a number to be used as line reference, • Subclause: This column lists the sub-clause of EN 50463-4 that is supported, • Capability: This column lists the supported capability, • Requirement: This column lists the supported requirement relevant to the listed clause, • Implementation: Brief note useful to understand how the requirement is implemented, • Param values: If applicable, this column report Parameter values relevant to the implementation Table C.1 is an example of the PICS table structure Table C.1 – PICS table format Ref C.2.2 Subclause Capability Requirement Abbreviations used in PICS The following abbreviations are used in this PICS pro-forma: m mandatory; n/a not applicable; o optional; c conditional; Implementation Param values BS EN 50463-4:2012 - 39 - d default; Y yes; N no C.2.3 EN 50463-4:2012 Ref column This column is used for reference purposes inside the PICS in order to identify each line of the table C.2.4 Subclause column This column gives the mapping between EN 50463-4 sub-clause and the corresponding entry in the PICS C.2.5 Capability column This column lists the supported capability with reference to the relevant sub-clause The capability is supported if the Implementation Under Assessment is able to: • generate the corresponding service parameters (either automatically or because the end user explicitly requires that capability); • interpret, handle and when required make available to the end user the corresponding service parameter(s) C.2.6 Requirement column This column indicates the level of support required for conformity to EN 50463-4 The values are as follows: m mandatory support is required; o optional support is permitted for conformity to EN 50463-4 If implemented it should conform to the specifications and restrictions contained in the relevant clause These restrictions may affect the optional classification of other items; c the item is conditional, the support of this item is subject to a predicate which is referenced in the note column; n/a the item is not applicable If options are not supported the corresponding items should be considered as not applicable C.2.7 Implementation column This column is completed by the supplier or implementer of the IUA The pro-forma has been designed so that the only entries required in its own column are: Y yes, the item has been implemented; N no, the item has not been implemented; – the item is not applicable In the PICS pro-forma tables, every leading item marked 'm' should be supported by the IUA Sub-items marked 'm' should be supported if the corresponding leading feature is supported by the IUA BS EN 50463-4:2012 EN 50463-4:2012 C.2.8 C.2.8.1 - 40 - Parameter values column Allowed This column is already filled and indicates the minimum value for a parameter C.2.8.2 Default value This column indicates the default value for a parameter When EN 50463-4 defines the default for the parameter, such a value is used as the entry in this column When the standard recommends a range, the mean value is used C.2.8.3 Allowed max This column is already filled and indicates the maximum value for a parameter C.2.8.4 Implemented value This column is completed by the supplier or implementer The pro-forma has been designed so that the entry required is the implemented value In case of multiple values, the default value is chosen C.3 PICS pro-forma examples C.3.1 Identification of PICS Table C.2 is completed in order to identify the pro-forma Table C.2 – PICS identification table Ref No Question Date of statement PICS serial number Response BS EN 50463-4:2012 - 41 - C.3.2 EN 50463-4:2012 Identification of the implementation under assessment Table C.3 is completed in to identify the implementation under assessment Table C.3 – IUA identification table Ref No Question Requirement Implementation name m Version number m Special configuration o Power supply voltage m Power supply current m Other information o Response NOTE Implementation name refers to the identifier of the IUA as indicated by the supplier The specific conformity test is applied to the entity identified by the implementation name NOTE This is the version number of the IUA When a version number is defined for an IUA, no subsystem that composes it can progress without a change of this figure (the architecture is frozen and constitutes a configuration) NOTE Indicated if PIXIT pro-forma are provided for this IUA NOTE Indicated the applicable power supply voltage Power supply voltage is chosen amongst the values specified in EN 50155 NOTE Indicated the applicable maximum power supply current Power supply current is chosen amongst the values specified in EN 50155 NOTE C.3.3 Other information the supplier considers relevant for IUA identification Identification of the IUA supplier Table C.4 is completed to identify the IUA supplier Table C.4 – IUA supplier identification table Ref No Question Requirement Organisation name m Contact name(s) m Address: m Telephone number m Fax number m e-mail address m Other information m Response BS EN 50463-4:2012 EN 50463-4:2012 C.3.4 - 42 - Identification of the standards Table C.5 is completed to identify the Standards applied to the IUA for the conformity test Table C.5 – Applicable standards identification table Ref No Question Response Specification document title Specification document IEC/CLC/CEN reference number Specification document date of publication Specification document version number Conformity document title Conformity document number Conformity document date of publication Conformity document version number C.3.5 Global statement of conformity Table C.6 is filled by the IUA supplier in the “Implementation” column Table C.6 – Global statement table Ref No Question Requirement Are all mandatory capabilities implemented? m Implementation [ ] NOTE Answering "No" to this section indicates non-conformity to the protocol specification Non-supported mandatory capabilities are to be identified in the PICS, with an explanation of why the implementation is nonconforming C.3.6 Level of conformity Table C.7 is completed by the IUA supplier in order to identify the IUA level of conformity Only the clauses and sub-clauses that are implemented are listed irrespectively if they are mandatory or optional Table C.7 shows five lines but obviously, the number of lines is determined by the implemented clauses and sub-clauses Table C.7 – Level of conformity Ref No EN 50463-4 subclause Capability Implementation [ ] [ ] [ ] [ ] [ ] BS EN 50463-4:2012 - 43 - EN 50463-4:2012 Annex D (informative) Access security The following text offers a proposal for the managements of the access rights The password and the granted access permissions (e.g to the application services) should be mapped in a Password/Permission Table that should be stored in a non-volatile memory of the EMS The access to this table should be granted only to the Administrator When the EMS is produced, the Password/Permission Table should be programmed in order that: 1) Manager password grants access to all information; 2) Administrator password grants the access to the functional parameters, calibration parameters and all the other information granted to the lower levels; 3) User password grants the access to the data and software essential to metrological performance and creation of CEBD, furthermore grants access to functional parameters not affecting this data; 4) download password grants the read only access to data essential to metrological performance and creation of CEBD and to CEBD The retrieving and visualisation of real time data should be available without any access control BS EN 50463-4:2012 EN 50463-4:2012 - 44 - Annex ZZ (informative) Coverage of Essential Requirements of EU Directives This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and within its scope the standard covers all relevant essential requirements as given in Annex III of the EU Directive 2008/57/EC Compliance with this standard provides one means of conformity with the specified essential requirements of the Directive(s) concerned WARNING: Other requirements and other EU Directives may be applicable to the products falling within the scope of this standard BS EN 50463-4:2012 - 45 - EN 50463-4:2012 Bibliography EN 50155:2007, Railway applications — Electronic equipment used on rolling stock IEC 60050 (all parts), International Electrotechnical Vocabulary EN 60359:2002, Electrical and electronic measurement equipment — Expression of performance (IEC 60359:2001) EN 61373, Railway applications — Rolling stock equipment — Shock and vibration tests (IEC 61373) ITU-R Recommendation TF.686, Glossary and definitions of time and frequency terms IEEE 802.11-2007, IEEE Standard for Information Technology-Telecommunications and Information Exchange Between Systems-Local and Metropolitan Area Networks-Specific Requirements – Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications This page deliberately left blank This page deliberately left blank British Standards Institution (BSI) BSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services It presents the UK view on standards in Europe and at the international level BSI is incorporated by Royal Charter British Standards and other standardisation products are 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