1、 Reference number ISO/IEC/IEEE 21451-4:2010(E) IEEE 2004INTERNATIONAL STANDARD ISO/IEC/ IEEE 21451-4 First edition 2010-05-15 Information technology Smart transducer interface for sensors and actuators Part 4: Mixed-mode communication protocols and Transducer Electronic Data Sheet (TEDS) formats Tec
2、hnologies de linformation Interface de transducteurs intelligente pour capteurs et actuateurs Partie 4: Protocoles de communication en mode mixte et formats des feuilles de donnes lectroniques du transducteur (TEDS) ISO/IEC/IEEE 21451-4:2010(E) PDF disclaimer This PDF file may contain embedded typef
3、aces. 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 editing. In downloading this file, parties accept therein the responsibility of not infrin
4、ging Adobes licensing policy. The ISO Central Secretariat, the IEC Central Office and IEEE do not accept any liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file
5、; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies and IEEE members. In the unlikely event that a problem relating to it is found, please inform the ISO Central Secretariat or IEEE at the address given
6、 below. COPYRIGHT PROTECTED DOCUMENT IEEE 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 or IEEE
7、 at the respective address below. ISO copyright office Institute of Electrical and Electronics Engineers, Inc. Case postale 56 CH-1211 Geneva 20 3 Park Avenue, New York NY 10016-5997, USA Tel. + 41 22 749 01 11 E-mail stds.iprieee.org Fax + 41 22 749 09 47 Web www.ieee.org E-mail copyrightiso.org We
8、b www.iso.org ISO version published 2010 Published in Switzerland ii IEEE 2004 All rights reservedISO/IEC/IEEE 21451-4:2010(E) IEEE 2004 All rights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specializ
9、ed system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical commit
10、tees collaborate in fields of mutual interest. Other international organizations, governmental and non- governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. IEEE Standar
11、ds documents are developed within the IEEE Societies and the Standards Coordinating Committees of the IEEE Standards Association (IEEE-SA) Standards Board. The IEEE develops its standards through a consensus development process, approved by the American National Standards Institute, which brings tog
12、ether volunteers representing varied viewpoints and interests to achieve the final product. Volunteers are not necessarily members of the Institute and serve without compensation. While the IEEE administers the process and establishes rules to promote fairness in the consensus development process, t
13、he IEEE does not independently evaluate, test, or verify the accuracy of any of the information contained in its standards. The main task of ISO/IEC JTC 1 is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies f
14、or voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is called to the possibility that implementation of this standard may require the use of subject matter covered by patent rights. By publication of this standard, n
15、o position is taken with respect to the existence or validity of any patent rights in connection therewith. ISO/IEEE is not responsible for identifying essential patents or patent claims for which a license may be required, for conducting inquiries into the legal validity or scope of patents or pate
16、nt claims or determining whether any licensing terms or conditions provided in connection with submission of a Letter of Assurance or a Patent Statement and Licensing Declaration Form, if any, or in any licensing agreements are reasonable or non-discriminatory. Users of this standard are expressly a
17、dvised that determination of the validity of any patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Further information may be obtained from ISO or the IEEE Standards Association. ISO/IEC/IEEE 21451-4 was prepared by the Technical Committee on Sensor Te
18、chnology of the IEEE Instrumentation and Measurement Society of the IEEE (as IEEE Std 1451.4-2004). It was adopted by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 31, Automatic identification and data capture techniques, in parallel with its approval by the ISO/IE
19、C national bodies, under the “fast-track procedure” defined in the Partner Standards Development Organization cooperation agreement between ISO and IEEE. IEEE is responsible for the maintenance of this document with participation and input from ISO/IEC national bodies. ISO/IEC/IEEE 21451-4:2010(E) i
20、v IEEE 2004 All rights reserved(blank page) ISO/IEC/IEEE 21451-4:2010(E) IEEE 2004 All rights reserved vIEEE Std 1451.4-2004 IEEE Standards 1451.4 TM IEEE Standard for A Smart Transducer Interface for Sensors and Actuators Mixed-Mode Communication Protocols and Transducer Electronic Data Sheet (TEDS
21、) Formats 3 Park Avenue, NewYork, NY 10016-5997, USA IEEE Instrumentation and Measurement Society Sponsored by the Technical Committee on Sensor Technology TC-9 IEEE Standards 15 December 2004 Print: SH95225 PDF: SS95225ISO/IEC/IEEE 21451-4:2010(E) vi IEEE 2004 All rights reserved(blank page) ISO/IE
22、C/IEEE 21451-4:2010(E) IEEE 2004 All rights reserved viiRecognized as an American National Standard (ANSI) The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2004 by the Institute of Electrical and Electronics Engineers, Inc. All rights
23、reserved. Published 14 December 2004. Printed in the United States of America. IEEE is a registered trademark in the U.S. Patent +1 978 750 8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. NOT
24、EAttention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent rights in connection therewith. The IEEE shall not be
25、 responsible for identifying patents for which a license may be required by an IEEE standard or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention.ISO/IEC/IEEE 21451-4:2010(E) IEEE 2004 All rights reserved ixIntroduction This introduction is
26、not part of IEEE Std 1451.4-2004, IEEE Standard for a Smart Transducer Interface for Sensors and ActuatorsMixed-Mode Communication Protocols and Transducer Electronic Data Sheet (TEDS) Formats. The main objectives of this standard are to Enable plug-and-play at the transducer level by providing a co
27、mmon IEEE 1451.4 Transducer communication interface compatible with legacy transducers. Enable and simplify the creation of smart transducers. Facilitate the support of multiple networks. Simplify the setup and maintenance of instrumentation systems. Provide a bridge between the legacy instrumentati
28、on systems and the smart mixed-mode transducers. Enable implementation of smart transducers with minimal use of memory. There was previously no defined common digital communication interface standard between mixed-mode transducers and network capable application processors (NCAPs). Each transducer m
29、anufacturer defined its own interface. Consequently, transducer manufacturers could not support all of the control networks for which their products might be suitable. A universally accepted mixed-mode transducer interface standard will facilitate the development of compliant smart sensors and actua
30、tors and could lead to lower development costs. This common interface allows the transducer manufacturers to support multiple control networks easily and helps to preserve the users investment if it becomes necessary to migrate to a different network standard. In addition, this standard will make sy
31、stems much easier to implement and use. This standard simplifies the development of smart mixed-mode transducers by defining hardware and software blocks that are independent of specific control networks. The standard describes the following: An IEEE 1451.4 Transducer containing a Mixed-Mode Interfa
32、ce (MMI) and a transducer electronic data sheet (TEDS). The MMI, which is a master-slave, multidrop, serial connection. It requires a master device to initiate each transaction with each slave or node according to a defined digital communication protocol. The MMI may contain circuitry to detect and
33、report a hotswap of transducers. The MMI may use either separate digital and analog connections, or two wires for power supply and time- shared analog signal and digital TEDS data. The MMI is used to access the TEDS. The TEDS, which is fixed and dynamic data, contained in one or more memory nodes on
34、 the MMI. A template, which is a software object describing the data structure of TEDS. It is implemented in the Template Description Language and resides in the Transducer Block. The Template Description Language, which is a scripted and tagged language providing a standard method to describe the f
35、unctionality of IEEE 1451.4 Transducer. A Transducer Block, which is a software object describing the IEEE 1451.4 Transducer. It resides in the NCAP, which is the master device (e.g., an instrument or data acquisition system). The Transducer Block is used to access, decode, and encode TEDS using the
36、 TDL. Furthermore, the Working Group has defined a set of TEDS templates for various transducers to facilitate the creation of sensor systems containing plug-and-play smart transducers. The IEEE 1451.4 Transducer provides a self-describing capability, via the TEDS. The TEDS contains fields that desc
37、ribe the identity, type, operation, and attributes of the transducer. The IEEE 1451.4 Transducer is a sensor or actuator with one or more addressable devices, referred to as nodes, on a 2-conductor digital bus. The TEDS is required to be either physically, or virtually, associated with the IEEE 1451.4 Transducer. The resulting hardware partition encapsulates the measurement aspects inside the IEEE 1451.4 Transducer, while the application related aspects may reside either in the NCAP or in the TEDS.
