1、 Reference numberISO/IEC/IEEE 21451-4:2010(E)IEEE 2004INTERNATIONAL STANDARD ISO/IEC/IEEE21451-4First edition2010-05-15Information technology Smart transducer interface for sensors and actuators Part 4: Mixed-mode communication protocols and Transducer Electronic Data Sheet (TEDS) formats Technologi
2、es 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 typefaces. I
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8、so.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 specialized syst
9、em 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 committees co
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14、g. 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, no positi
15、on 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 patent claim
16、s 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 advised t
17、hat 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 Technology
18、 of the IEEE Instrumentation and Measurement Society of the IEEE (as IEEE 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/IEC national b
19、odies, 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) iv IEEE 2004
20、All rights reserved(blank page) ISO/IEC/IEEE 21451-4:2010(E) IEEE 2004 All rights reserved vIEEE Std 1451.4-2004IEEEStandards1451.4TMIEEE Standard for A Smart TransducerInterface for Sensors and ActuatorsMixed-Mode Communication Protocolsand Transducer Electronic Data Sheet(TEDS) Formats3 Park Avenu
21、e, New York, NY 10016-5997, USAIEEE Instrumentation and Measurement SocietySponsored by theTechnical Committee on Sensor Technology TC-9IEEEStandards15 December 2004Print: SH95225PDF: SS95225ISO/IEC/IEEE 21451-4:2010(E) vi IEEE 2004 All rights reserved(blank page) ISO/IEC/IEEE 21451-4:2010(E) IEEE 2
22、004 All rights reserved viiRecognized as anAmerican National Standard (ANSI)The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2004 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 14 December 20
23、04. 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 ofany individual standard for educational classroom use can also be obtained through the Copyright ClearanceCenter.NOTEAttention is called to the possibilit
24、y that implementation of this standard may require use of subjectmatter covered by patent rights. By publication of this standard, no position is taken with respect to theexistence or validity of any patent rights in connection therewith. The IEEE shall not be responsible foridentifying patents for
25、which a license may be required by an IEEE standard or for conducting inquiries into thelegal validity or scope of those patents that are brought to its attention.ISO/IEC/IEEE 21451-4:2010(E) IEEE 2004 All rights reserved ixIntroductionThis introduction is not part of IEEE Std 1451.4-2004, IEEE Stan
26、dard for a Smart Transducer Interface for Sensors andActuatorsMixed-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 common IEEE 1451.4 Transducercommunication inte
27、rface 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 instrumentation systems and the smart mixed-mode transducer
28、s. Enable implementation of smart transducers with minimal use of memory.There was previously no defined common digital communication interface standard between mixed-modetransducers and network capable application processors (NCAPs). Each transducer manufacturer defined itsown interface. Consequent
29、ly, transducer manufacturers could not support all of the control networks forwhich their products might be suitable. A universally accepted mixed-mode transducer interface standardwill facilitate the development of compliant smart sensors and actuators and could lead to lowerdevelopment costs. This
30、 common interface allows the transducer manufacturers to support multiple controlnetworks easily and helps to preserve the users investment if it becomes necessary to migrate to a differentnetwork standard. In addition, this standard will make systems much easier to implement and use.This standard s
31、implifies the development of smart mixed-mode transducers by defining hardware andsoftware blocks that are independent of specific control networks. The standard describes the following: An IEEE 1451.4 Transducer containing a Mixed-Mode Interface (MMI) and a transducer electronicdata sheet (TEDS). T
32、he MMI, which is a master-slave, multidrop, serial connection. It requires a master device toinitiate each transaction with each slave or node according to a defined digital communicationprotocol. The MMI may contain circuitry to detect and report a hotswap of transducers. The MMImay use either sepa
33、rate 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 the MMI. A template, which is a software object describing t
34、he data structure of TEDS. It is implemented inthe Template Description Language and resides in the Transducer Block. The Template Description Language, which is a scripted and tagged language providing a standardmethod to describe the functionality of IEEE 1451.4 Transducer. A Transducer Block, whi
35、ch is a software object describing the IEEE 1451.4 Transducer. It resides inthe NCAP, which is the master device (e.g., an instrument or data acquisition system). TheTransducer Block is used to access, decode, and encode TEDS using the TDL.Furthermore, the Working Group has defined a set of TEDS tem
36、plates for various transducers to facilitatethe 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 fieldsthat describe the identity, type, operation, and attributes of the transducer.
37、 The IEEE 1451.4 Transducer is asensor 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. Theresulting hardware partition encapsulates the measure
38、ment aspects inside the IEEE 1451.4 Transducer,while the application related aspects may reside either in the NCAP or in the TEDS.ISO/IEC/IEEE 21451-4:2010(E) x IEEE 2004 All rights reservedThe IEEE 1451.4 Transducer is a sensor or actuator with one, or more, addressable devices, which hereinwill be
39、 referred to as nodes, containing TEDS. A digital communication protocol is defined for transactions on the bus. The transactions are as follows:Read (Read TEDS) Write (Write TEDS) Configure (Set Gain, Change Mode, Set Filter) Check status (Read Settings)The IEEE 1451.4 MMI may be used for control n
40、etworks and data acquisition in a variety of applications,such as portable instruments and data acquisition plug-in cards for PCs.The Transducer Block object located in the NCAP describes the behavior of the IEEE 1451.4 Transducer. Itinterprets TEDS data according to the data structure defined in te
41、mplates. Further processing of the data maytake place both in the NCAP and in other processors in larger systems. The NCAP includes an IEEE 1451.1object model with an IEEE 1451.4 Transducer Block.The standard does not constrain competitive differentiation in areas of quality, feature set, and cost,
42、and atthe same time, offers the opportunity to design to a common interface, which can be used in a wide varietyof applications. AcknowledgementsThe working group would like to acknowledge the following individuals who made special contributions tothe development of this standard:Steven Chen, Former
43、 Chair, who proposed the mixed-mode transducer interface concept and initiated thedevelopment of the standard.Jrgen Bkke, Former Vice Chair, who was instrumental in getting the 2-conductor bus interface andtransducer description language concept accepted by the group.The IEEE has defined a common di
44、gital communication interface standard for mixed-mode transducersutilizing a single wire serial bus technology developed by Maxim/Dallas Semiconductor Corporation.Notice to usersErrataErrata, if any, for this and all other standards can be accessed at the following URL: http:/standards.ieee.org/read
45、ing/ieee/updates/errata/index.html. Users are encouraged to check this URL forerrata periodically.InterpretationsCurrent interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/index.html.ISO/IEC/IEEE 21451-4:2010(E) IEEE 2004 All rights reserved xiPatentsA
46、ttention is called to the possibility that implementation of this standard may require use of subject mattercovered by patent rights. By publication of this standard, no position is taken with respect to the existence orvalidity of any patent rights in connection therewith. The IEEE shall not be res
47、ponsible for identifyingpatents or patent applications for which a license may be required to implement an IEEE standard or forconducting inquiries into the legal validity or scope of those patents that are brought to its attention. A patentholder or patent applicant has filed a statement of assuran
48、ce that it will grant licenses under these rightswithout compensation or under reasonable rates and nondiscriminatory, reasonable terms and conditions toapplicants desiring to obtain such licenses. The IEEE makes no representation as to the reasonableness ofrates, terms, and conditions of the licens
49、e agreements offered by patent holders or patent applicants. Furtherinformation may be obtained from the IEEE Standards Department.ISO/IEC/IEEE 21451-4:2010(E) xii IEEE 2004 All rights reservedContents1. Overview 11.1 Scope 21.2 Purpose. 21.3 Conformance, shall, should, may, and can 22. References 23. Definitions and abbreviations 33.1 Terms . 33.2 Abbreviations. 64. IEEE 1451.4 Transducer 74.1 Foundation . 74.2 IEEE 1451.4 Transducer configuration . 84.3 Compliance with this standard, IEEE Std 1451.4-2
