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1、 Reference number ISO 15765-1:2004(E) ISO 2004 INTERNATIONAL STANDARD ISO 15765-1 First edition 2004-03-15 Road vehicles Diagnostics on Controller Area Networks (CAN) Part 1: General information Vhicules routiers Diagnostic sur gestionnaire de rseau de communication (CAN) Partie 1: Informations gnra
2、les -,-,- ISO 15765-1:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editi
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5、he address given below. ISO 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below
6、or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reserved -,-,- ISO 15765-1:2004(E) ISO 2004 All rights rese
7、rved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for
8、which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on al
9、l matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are
10、circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held res
11、ponsible for identifying any or all such patent rights. ISO 15765-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. ISO 15765 consists of the following parts, under the general title Road vehicles Diagnostics on Controller Area Ne
12、tworks (CAN): Part 1: General information Part 2: Network layer services Part 3: Implementation of unified diagnostic services (UDS on CAN) Part 4: Requirements for emissions-related systems -,-,- -,-,- INTERNATIONAL STANDARD ISO 15765-1:2004(E) ISO 2004 All rights reserved 1 Road vehicles Diagnosti
13、cs on Controller Area Networks (CAN) Part 1: General information 1 Scope This part of ISO 15765 gives an overview of the structure and the partitioning of ISO 15765, and shows the relation between the different parts. It also defines the diagnostic network architecture. The terminology defined in th
14、is part of ISO 15765 is common for all diagnostic networks and is used throughout all parts of ISO 15765. 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, th
15、e latest edition of the referenced document (including any amendments) applies. ISO 11898 (all parts), Road vehicles Controller area network (CAN) ISO 14229-1, Road vehicles Unified diagnostic services (UDS) Specification and requirements1) 3 Terms and definitions For the purposes of this document,
16、the terms and definitions given in ISO 14229-1 apply. 4 Overview of ISO 15765 4.1 General ISO 15765 is applicable to vehicle diagnostic systems implemented on a Controller Area Network (CAN) communication network as specified in ISO 11898. ISO 15765 has been established in order to define common req
17、uirements for vehicle diagnostic systems implemented on a CAN communication link as specified in ISO 11898. Although primarily intended for diagnostic systems, ISO 15765 has been developed to also meet requirements from other CAN based systems needing a network layer protocol. 1) To be published. (R
18、evision of ISO 14229:1998) -,-,- ISO 15765-1:2004(E) 2 ISO 2004 All rights reserved To achieve this, ISO 15765 is based on the Open Systems Interconnection (OSI) Basic Reference Model specified in ISO/IEC 7498 and ISO/IEC 10731, which structures communication systems into seven layers. When mapped o
19、n this model, the services specified by ISO 15765 are divided into diagnostic services (layer 7), specified in ISO 15765-3, network layer services (layer 3), specified in ISO 15765-2, CAN services (layers 1 and 2), specified in ISO 11898-1, in accordance with Table 1. Table 1 Open Systems Interconne
20、ction (OSI) layers Vehicle manufacturer enhanced diagnostics Legislated on-board diagnostics (OBD) Diagnostic application User defined ISO 15031-5 Application layer ISO 15765-3 ISO 15031-5 Presentation layer N/A N/A Session layer N/A N/A Transport layer N/A N/A Network layer ISO 15765-2 ISO 15765-4
21、Data link layer ISO 11898-1 ISO 15765-4 Physical layer User defined ISO 15765-4 The application layer services have been defined in compliance with diagnostic services defined in ISO 14229-1 and ISO 15031-5, but are not limited to be used only with these International Standards. ISO 15765-3 is also
22、compatible with most diagnostic services defined in national standards or in vehicle manufacturer specifications. The network layer services have been defined to be independent of the physical layer implemented. A physical layer is only specified for legislated on-board diagnostics (OBD). For other
23、application areas, ISO 15765 can be used with any CAN physical layer. 4.2 Open Systems Interconnection (OSI) model ISO 15765 is based on the Open Systems Interconnection (OSI) Basic Reference Model as specified in ISO/IEC 7498 which structures communication systems into seven layers. All parts of IS
24、O 15765 are guided by the OSI service conventions as specified in ISO/IEC 10731 to the extent that they are applicable to diagnostic services. These conventions define the interaction between the service user and the service provider through service primitives. The aim of this subclause is to give a
25、n overview of the OSI model and show how it has been used as a guideline for this part of ISO 15765. It also shows how the OSI service conventions have been applied to ISO 15765. The OSI model structures data communication into seven layers called (top down) Application layer (layer 7), Presentation
26、 layer, Session layer, Transport layer, Network layer, Data Link layer and Physical layer (layer 1). A subset of these layers is used in ISO 15765. -,-,- ISO 15765-1:2004(E) ISO 2004 All rights reserved 3 ISO 15765 specifies Application layer, Session layer, Transport layer, Network layer, Data Link
27、 layer and Physical layer for diagnostics on CAN. The purpose of each layer is to provide services to the layer above. The application layer provides services to the diagnostic application. The active parts of each layer, implemented in software, hardware or any combination of software and hardware,
28、 are called entities. In the OSI model, communication takes place between entities of the same layer in different nodes. Such communicating entities of the same layer are called peer entities. The services provided by one layer are available at the Service Access Point (SAP) of that layer. The layer
29、 above can use them by exchanging data parameters ISO 15765 distinguishes between the services provided by a layer to the layer above it and the protocol used by the layer to send a message between the peer entities of that layer. The reason for this distinction is to make the services, especially t
30、he application layer services and the transport layer services, reusable also for other types of networks than CAN. In this way the protocol is hidden from the service user and it is possible to change the protocol if special system requirements demand it. 5 Diagnostic network architecture 5.1 Diagn
31、ostic network The diagnostic network, as a whole, contains all clients and servers that can communicate with each other. A diagnostic network can range from a simple point-to-point connection between a client and a server to a complex distributed network architecture with several physical sub-networ
32、ks inter-connected by diagnostic gateways. 5.2 Diagnostic sub-network All clients and servers of a sub-network are connected to the same physical communication link. For ISO 15765 all clients and servers of a sub-network are connected to the same physical CAN network and are able to communicate dire
33、ctly with each other. The term sub-network shall also apply to other physical communication links like fibre-optic buses and networks complying with SAE J1850 or ISO 14230. 5.3 Diagnostic gateway A diagnostic gateway is a node in the network that is physically connected to two (or more) sub-networks
34、 and has the ability to transfer diagnostic messages between the sub-networks. Connecting individual sub-networks via diagnostic gateways creates larger diagnostic network architectures. -,-,- ISO 15765-1:2004(E) 4 ISO 2004 All rights reserved Bibliography 1 ISO 14230 (all parts), Road vehicles Diag
35、nostic systems Keyword Protocol 2000 2 ISO 15031-5, Road vehicles Communication between vehicle and external equipment for emissions-related diagnostics Part 5: Emissions-related diagnostic services 3 ISO 15765-2, Road vehicles Diagnostics on Controller Area Networks (CAN) Part 2: Network layer serv
36、ices 4 ISO 15765-3, Road vehicles Diagnostics on Controller Area Networks (CAN) Part 3: Implementation of unified diagnostic services (UDS on CAN) 5 ISO 15765-4, Road vehicles Diagnostics on Controller Area Networks (CAN) Part 4: Requirements for emissions-related systems 6 ISO/IEC 7498 (all parts),
37、 Information technology Open Systems Interconnection Basic Reference Model 7 ISO/IEC 10731, Information technology Open Systems Interconnection Basic Reference Model Conventions for the definition of OSI services 8 SAE J1850: Class B Data Communications Network Interface -,-,- -,-,- ISO 15765-1:2004(E) ICS 43.040.15 Price based on 4 pages ISO 2004 All rights reserved -,-,-