ANSI C12.18

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This standard details the criteria required for communications between a C12.18 Device and a C12.18 Client via an optical port. The C12.18 Client may be a handheld reader, a portable computer, a master station system or some other electronic communications device. This standard provides details for
tican Nate ANsI ANS|c1218-2006 Revision of ANs|c12.18-1996 American National Standard Protocol Specification for ANSI Type 2 Optical Port Secretariat: National Electrical manufacturers association Approved May 2, 2006 American National Standards Institute, Inc icensed to Yoshitaka lkezoe. ANSI store order fX 29507 Dow: oacie- 12/47120089: 17 PM. Sincle user l: cense oniy. Copy ng and networking prohibited Rep: ofled by ANSI u:lder lice ise from IHs a!d NEM ANS|c12.18-2006 NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consens does not necessarily mean that there is unanimous agreement among every person participating in the development of this document NEMA standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications nEMa disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty ol warranty, express or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. nema does not undertake to guarantee the performance of any individual manufacturer or seller's products or services by virtue of this standard or guide In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMa undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. 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IS and NElA ANs|c1218-2006 AMERICAN Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other NATIONAL criteria for approval have been met by the standards developer STANDARD Consensus is established when, in the judgment of the ANSI Board of Standare substantial agreem ent has be ached by d and materially affected interests. Substantial agreement means much more than a simple majority but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing purchasing, or using products, processes, or procedures not conforming to the standards The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the american National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard Caution Notice: This American National Standard may be revised or withdrawn at any time. the procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of american Nationa Standards may receive current information on all standards by calling or writing the American National Standards Institute Published by National electrical Manufacturers Association 1300 North 17th Street, Rosslyn, VA 22209 C Copyright 2006 by National Electrical Manufacturers Association All rights reserved including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and artistic Works, and the international and Pan American Copyright Conventions. No part of this publication may be reproduced in any form, in an electronic retrieval system or other ithout the prior written permission of the publisher Printed in the United states of america Licensed to y'osneraka kazoe. ANSi store order #X 9850. Dowrioaced 12/17 20089: 17 PM S:n gie trse: lit e:s H only Co: ying and :etwo.king prohibited Re prcduced by ANSI u::r license fror- IHS (and NEMA ANs|c12182006 This page intentionally left blank Lice! sed ie YoshitaKE虫e0 ANSI store由X身57 !12/17/20089 17 PM. Single user # ss only. Copying and ret vork ng prohibited Reproduced Dy A\NS uinder license irom HS 3nd NEM ANs|C12.18-2006 Conte Page 2 References 3 Definitions and Syntax 3.1 Definitions 31.1C1218 Client.… 3.12c12.18 Device 3.1.3 Point-to-point Communications 3.1. 4 Table 3.2 Document Sy 4 Protocol Details 4.1 Order of fransmission 4.2 Layer 7--Application Layer 4.2.1 Data Structure 4.2.2 Protocol Specifications for Electric Metering Request Codes 4.222 Response Codes… 23333446 4.2,2.3 dentification Service Read Service 9 Write Service Logon Service 12 Security s 13 4228 Logoff Service…, 13 Negotiate Service 14 Wait Service 15 Terminate Service 15 Partial Table Access Using the Index/element-count Method 16 4.2.2. 13 Index Count Access Method Examples 4. 2.2.14 Partial Table Access Using the Offset/octet-count Method 4.3 Lay Presentation layer 19 4.4 Layer 5-Session Layer .19 4.5 Layer 4--Transport Layer. 19 4.6 Layer 3-Network Lay 19 4.7 Layer 2-Data Link layer 4.7.1 Basic Data 19 4.7.1 Default Setting 20 4.7.2 Packet 20 4.7.3 Duplicate packets 21 4.74 CRC selection.… 4.7.5 Acknowledgment 4.7.6 Retransmission 4.77 Time-out.,,…, Channel Traffic Time-out Inter-character Time-out 4. 7.7.3 Response Time-out 4.7.8 Delays,,,,.,.,.,,, 垂由.4曲由‘垂垂··白·由:中·垂由·垂自s.自,1垂由垂垂由垂b1,垂曲上看垂p白. 23 Turn-around Delay ,23 4.8 Layer-1-Physical Lay 8.1 Physical 23 4.8.2 Basic Data aa::·4·· 24 4.8.3 Light Levels 24 4.8. 3.1 Optical Characteristics Transmitter Characteristics Licensed to Yoshitaka Hk. ezoe. ANSi store order X 98507 Cow loaded 12117: 20089: 1? PM A Single user license on y Copying ar( n ng prohibited m iHs a:d NEW兵, ANs|c12.182006 4.8. 3.3 Receiver Characteristics Environmental Lighting Condition 26 5 Compliance 26 Annex a- Communication Example Layer 7 and Layer 2) Annex b- Packet Transmission Example 29 Annex C- Service Sequence State Control 31 Annex d… Compatibility,… 甲专甲q垂 D 1 Backward compatibility with previous versions of the Standard D, 2 Forward compatibility with next versions of the standard Annex E-Historical background E1 Foreword of c12181996andC1218-1996(R2002)…… +h··mb当话+.中 Licensed to Yosriiaka lkezoe. ANS! store order X 98507. Downloaded 12/17/20039: 17 PM. S ngie user lic ense orly. Copy ng and networ king roh bite d Reprodt C ed by ANSI uCer liC e: ise ron HifS a: t NEMA ANS|c12.182006 Foreword (this Foreword is not part of American National Standard C12.18-2006. This American National Standard provides an open-platform communications protocol for two-way communication with a metering device through an ANSI Type 2 Optical Port. The protocol is written to conform to the OsI seven-layer stack Long-time readers of ANSI C12.18 will discover many editing changes to this version of the Standard The Working Group chose to improve the clarity of the text as an aid to the reader while retaining the Normative elements in the manner of previous publications The 2006 revision of this standard was considered in the context of the so-called "protocol suite"of ANSK standards: C12.18, C12.19, C12.21 and C12.22 (draft). Changes made were included only after assuring that existing devices implementing C12. 18 would continue to remain compatible with the 2005 revision This revision has corrected an error in the original standard: the impossibility of using index-count for table access. Other concepts addressed include compliance, backward and forward compatibility, the use of reserved fields, the Identification Service, packet size and the toggle bit. Finally, some alignment with the draft C12.22 standard was performed to meet the goal of producing a coherent suite of protocol standards Suggestions for improvement to this Standard are welcome. They should be sent to National Electrical Manufacturers association Vice President of Engineering 1300 North 17th Street Suite 1752 Rosslyn, VA 22209 This Standard was processed and approved for submittal to ANSI by Accredited Standards Committee for Electricity Metering C12. At the time the committee approved this Standard, the C12 Committee had the following members Tom Nelson. Chairman Paul Orr, Secretary Michael Anderson Ed beroset Ron breschini Curt crittenden David ellis Cruz gomez Bob Hughes Lawrence Kotewa Francis marta John mcevoy Herman Millican James mining Avygdor Moise Tim Morgan Roy Moxley D Young Nguyen Lauren pasanen Aaron Snyder Richard Tucker Scott Weikel i icensed to Yoshitaka lkezoe. ANS! storo Cider #X 95507. Downleacied: 2 17/2008 9: :7 PM!. Singie uGo: li onsc only Copying anc nrtivorking prohibited produced hy ANGI linder license rcn IHS and NEMA ANsc12.182006 Working Group 4 of Subcommittee 17 that developed the Standard consisted of: Aaron Snyder, chairman Peter Martin . Vice Chairman Norbert balko Editor Michael Anderson Ed Beroset Martin burns Janice Jennings Lawrence Kotewa Robert McMichael Avygdor Moise Vuong nguyen Terry Penn Bin Qi Richard Tucker Miche|∨ gillette virgⅰ nia Minkowski Licensed to Yoshitaka Ikazoc. ANSI Eto: c oIdes # X 98507 Cow:unclad 12/17/20089: 17 PM: S:ng!c tIGo- liErse cry. Copying ard networking prohibited Reproduced by ANS! Unde license ton:3挂电 d nEA

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