欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    EN 60870-5-2-1993 en Telecontrol Equipment and Systems Part 5 Transmission Protocols Section 2 Link Transmission Procedures《遥控设备和系统 第5部分 传输协议 第2节 链接传输程序(IEC 870 5 2-1992)》.pdf

    • 资源ID:719074       资源大小:1.56MB        全文页数:48页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    EN 60870-5-2-1993 en Telecontrol Equipment and Systems Part 5 Transmission Protocols Section 2 Link Transmission Procedures《遥控设备和系统 第5部分 传输协议 第2节 链接传输程序(IEC 870 5 2-1992)》.pdf

    1、A* .EuROPEANsIANDARD NORME EUR0PEE”E EUROP- NORM 3404583 0099379 298 EN o870-52 September 1993 UDC 621.398 : 621.316.1 : 681.3.04 Descriptors: Teleprocessing, control processes, telecontrol, data transmission, open system interconnection, data transmission procedure, data rnukihk procedure, protocol

    2、, data structure, frame English veision Telecontrol equipment and systems Part 5: ?k.ansmission protocols Section 2: Link transmission procedures (IEC 870-52 : 1992) Matriels et Systemes de tlconduite Femwirkeinrichtungen und Fernw yLksysteme Teil 5 erhagmgprotokolle Partie 5 protocoles de transmiss

    3、l on Section 2 Procdures de transmission de liaison Hauptabschnitt 2: aertragungsprozeduren der de donnes Verbindungsducht (CEX 87052 : 1992) C 87052 : 1992) This European Standard was approved by CENELEC on 19934746. CENELEC members are bound to comply with the CEN/CENELEC internal Regulations whic

    4、h stipulate the conditions for giving this European Standard the status of a national stanard without any alteration. Upto-date lists and bibliographicai references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European St

    5、andard exists in three official versions (English, French, German). A veision in any other ianguage made by translation under the responsibility of a CENELEC member into its own language and notied to the Centrai Secretariat has the same status as the official versions. CENELEC members are the natio

    6、nal electrotechnicd committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugd, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisat

    7、ion Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1060 Brussels O 1993 Copyright reserved to CENELEC members Ref, No. EN 6087052 : 1993 E Foreword The CENELEC questionnaire procedure, performed for nding out whether or not the Intrnation

    8、al Standard IEC 87W2 : 1992 could be accepted without textual changes, has shown that no common modicaons were necessary for the acceptance as European Standard. The reference document was submitted to the CENELEC members for formal vote and was approved by CENELEC as EN 6087052 on 6 July 1993. The

    9、following dates were xed: - latest date of publication of an identicai national standard (dop) 19940801 - latest date of withdmwal of conflicting national standards (dow) 1994-0801 _- 1 3404583 0099380 TOT Annexes designated normative are part of the body of the standard. in this standard, annexes A

    10、 and ZA are normative. i .- = 3404583 0099383 946 870-5-2 O IEC INTRODUCTION This section of IEC 870-5 is pari of a series which highlights specific requirements and conditions for data transmission in telecontrol systems and describes ways to meet those requirements. In terms of the OS1 (Open Syste

    11、m Interconnection) reference model of SO-CCITT, which subdivides communication into seven layers, this section is concerned with the procedures required by the second layer: the link layer. Section 1 covers the two bottom layers: the physical layer and the link layer, the latter being explained in t

    12、erms of admissible frame formats and rules for frame synchronization. This section specifies standard link transmission procedures which operate on the link layer. 870-5-2 O IEC TELECONTROL EQUIPMENT AND SYSTEMS Part 5: Transmission protocols Section 2: Link transmission procedures 1 scope and objec

    13、t 1.1 Scope This section of IEC 870-5 applies to telecontrol equipment and systems with coded bit serial data transmission for monitoring and controlling geographically widespread processe s. The defined link procedures are restricted to message transmission sequences operating with size 1 windows.

    14、This means that the link layer of the primary station (station that initiates a message transfer) accepts a request for a new message transfer only when a previously accepted request for a message transfer is terminated either successfully or with an error indication. The procedures are applicable t

    15、o balanced and unbalanced trans- mission in telecontrol systems using half duplex or duplex transmission channels. 1.2 Object The standard transmission procedures defined by this section are applicable to point-to- point, multiple point-to-point, multipoint-star, multipoint-partyline and multipoint-

    16、ring configurations as described in 4.4 of IEC 870-1-1. The data transmission functions in these systems are composed of three basic types of link transmission services, namely: 1. SEND/NO REPLY 2. SENDICONFIRM 3. REQUEST/RESPOND The two services SENDICONFIRM and REQUEST/RESPOND consist of a sequenc

    17、e of non-separable dialogue elements between requesfing stations and responding stations. The protocol defined in this section accepts and processes only a single link trans- mission service at a time in each direction of a bidirectional communication system. Each transmission service is terminated

    18、either successfully or with error reports before the next transmission service begins. This means that the window size for successive packet transfers is 1 and the specified error recovery for the transmission services SENDICONFIRM and REQUEST/RESPOND utilize the stop-and-wait method for automatic r

    19、epeat requests (ARQ). 2 = 3404583 0099335 Tbb 870-5-2 O IEC In point-to-point configurations equipped with duplex channel operation. the defined protocol supports balanced transmission procedures, that is simultaneous data trans- mission services in both directions of the communication link. This en

    20、ables outstations to report spontaneous events to the control station as they occur, without having to be polled. This reduces reporting delays and leads to faster data acquisition. However, the use of an individual duplex communications channel to each outstation leads to increased equipment costs.

    21、 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this section of IEC 870-5. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this

    22、section of IEC 870-5 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 50(371): 1984, International Electrotechnical Vocabulary (IEV) - Chapter

    23、 371: Tele- control. IEC 870-1 -1 : 1988, Telecontrol equipment and systems - Part 7: General considerations - Section one: General principles. IEC 870-5-1 : 1990, Telecontrol equipment and systems - Pat7 5: Transmission protocols - Section One: Transmission frame formats. 3 Formats and structures o

    24、f standard transmission frames The transmission procedures defined in this section provide protection against resi- dual (.e. undetected) transmission errors in the range of integrity class Il, specified in IEC 870-5-1, if the transmission frame format FT 1.1 is used and if the transmission rules sp

    25、ecified by that section are observed. Residual transmission errors in the range of integrity class 12 are achieved if one of the transmission frame formats FT 1.2, FT 2 or FT 3, specified by that section, are utilized and if the corresponding transmission rules are observed. Only one chosen transmis

    26、sion frame format may be used on any given physical communications channel in a system. The order of fields in the frames is generally as follows: Length (one octet) Control (one octet) Address (one or more octets, by agreement) Link user data (n octets) 870-5-2 O IEC 3.1 Format FT t. 1 User data Fr

    27、ame with variable length Frame with fixed length (Note 1) (Note 2) Single character (called single control character in IEC 870-5-1) L: length field range: 0.127 L specifies the number of subsequent user data octets including the control and address fields C: control field A: address field, optional

    28、 NOTES 1 2 The unshaded fields are the user data of the frame as indicated in IEC 870-5-1. There is no special frame with a fixed length; the variable length frame is used in all cases. The shaded fields have already been defined in IEC 870-5-1. ! 4 a 870-5-2 O IEC Link user data 3.2 Format FT 1.2 (

    29、Note 1) User data Frame with variable length II A I (Notes 1 and 4) (Note _I 3) Frame with fixed length . . A . /;,swcf$i; ; . i.: . . ; Link user (Note 1) W 3404583 0099337 839 Single character (called single control character in IEC 870-5-1) (Note 1) (Notes 1 and 2) +I I L: length field range: 0.2

    30、55 L specifies the number of subsequent user data octets including the control and address fields C: control field A: address field. optional NOTES 1 bits with weights 27 _ 2 denote the left hexadecimal character and bits with weights 23 . 20 denote the right hexadecimal character, Specified data oc

    31、tets are represented in hexadecimal notation, in which O110 lo00 - 68 e.g.: 68 H t - The sequence of bit transmission begins. as defined in IEC 870-5-1. with the least significant bit 20. 2 3 4 The unshaded fields are the user data of the frame as indicated in IEC 870-5-1 Reserved for special use by

    32、 agreement. A fixed number of user data octets is specified per system. The shaded fields have already been defined in IEC 870-5-1. . . 3404583 0099338 775 870-5-2 O I EC 3.3 Format FT 2 Frame with variable length Frame with fixed length Single character (called start character 2 in IEC 870-5-1) (No

    33、tes 1 and 3) (Note 1) (Note 1) l+l data User Link (Note 2) User data LPO C A Link user data (Note 2) (Note L: length field range: 0.255 L specifies the number of subsequent user data octets including the control and address octets and excluding the CRC-check octets L = O specifies a fixed frame leng

    34、th with at least 2 user data octets L O specifies a variable frame length with L user data octets C: control field A: address field, optional CRC-check: Cyclic Redundancy Check NOTES 1 0010 o111 e.g. 27H P - - 2 7 The sequence of bit transmission begins, as defined in IEC 870-5-1. with the most sign

    35、ificant bit. Specified data octets are represented in hexadecimal notation, 2 Up to 15 user data octets are completed by a CRCcheck octet (see IEC 870-5-1. subclause 6.2.4.3.1. R3). 3 The unshaded fields are the user data of the frame as indicated in IEC 870-5-1. The shaded fields have already been

    36、defined in IEC 870-5-1. 6 I 3404583 0099339 bol 1 870-5-2 O IEC 3.4 FormatFT3 Frame with variable length Link user (Note 2) data Frame with fixed length User ttri (Notes 1 and (Note i) User data data I I Link I 3) i ICI . 1.1 /IF1 user (Note 1) (Note 1) (Note 2) (Note 2) (Note 2) Single character (c

    37、alled ?start character 2? in IEC 870-5-1) . (Note 1) (Note 1) L: length field range: 0.255 L specifies the number of subsequent user data octets including the control and address octets and exclud- ing the CRC-check octets L = O specifies a fixed frame length with at least 2 user data octet L O spec

    38、ifies a variable frame length with L user data octets C: control field A: address field, optional CRC-check: Cyclic Redundancy Check NOTES 1 Specified data octets are represented in hexadecimal notation. 0110 O100 64Hz-p 64 oooo O101 e.g. 05H I - - o5 The sequence of bit transmission begins, as defi

    39、ned in IEC 870-5-1. with the most significant bit. 2 Up to 16 user data octets are completed by a CRC-check octet (see IEC 870-5-1. subclause 6.2.4.4.1. R3). 3 The unshaded fields are the .user data? of the frame as indicated in IEC 870-5-1 The shaded fields have already been defined in IEC 870-5-1.

    40、 . -. ! 3404583 0099340 323 , b .SEND (D) SENDI NO REPLY (SI 1 870-5-2 O IEC IN0 (D) b 4 Service primitives and elements of transmisslon procedures The data communication is described by “service primitives“ crossing the interface between the service user and the link layer, and associated of the li

    41、nk between communicating stations, “transmission procedures“ RESPOND (S3) CON (D) 4 D = data The contents of the service primitives (parameters, conditions, etc.) are not standardized in this section. RESP (D) RE-4 1 TIME I I I Service Link Link transmission procedures Service primitives REQ ID) I L

    42、ink layer Sei Service user BS I REQ I I IN0 REQUEST/ b Figure 1 - Relationship between service primitives and transmission procedures for basic link services 8 i W 3404583 0099343 2bT W I 870-5-2 O IEC Figure 1 shows error free transmission procedures of basic link services. Transmission errors are

    43、only detected by receiving stations. A secondary station receiving a disturbed SEND or REQUEST frame does not reply. This is detected by the primary station timing out, because the expected CONFIRM or RESPOND frame is not received. Also a primary station receiving a disturbed CONFIRM or RESPOND fram

    44、e ignores it and consequently detects the error. There are four types of primitives that may contain user data and sets of parameters and condit ions, namely: request primitive REO: a request issued by the service user to invoke some procedure in the link layer; confirmation primitive CON: a confirm

    45、ation issued by the link layer to complete the procedure previously invoked by a request; a indication issued by the link layer to announce the wish to deliver data to the service user, or to invoke some service user procedure; indication primitive IND: response primitive RESP: a response issued by

    46、the service user to an- nounce the completion of a procedure previously invoked by an indication. NOTE - Confirmations or responses can be positive or negative. as appropriate to the circumstances. Typical contents of the service primitives are parameters, conditions and user data as fo Ilow s : use

    47、r data; types of transmission service (function code, e.g. SEND/CONFIRM); negative/positive confirmations or responses; DFC (data flow control); ACD (access demand); number of repetitions (e.g. 3); error status (e.g. after a repeated transmission error); status of the layer (e.g. restart conditions)

    48、. 4.1 SENDINO REPL Y service 4.1 .l Service primitives - Primary station The link layer accepts the request primitive REQ (SEND/NO REPLY) given by the link user when it is able to transmit the message. If the link layer is not able to transmit the message (disconnection from line or error state) a n

    49、egative Confirmation primitive CON (negative, SEND/NO REPLY, error status) is returned. 870-5-2 O IEC - Secondary station An indication primitive IND (no response required) announces the reception of the message to the service user of the secondary station. 4.1.2 Transmission procedure The specified SEND frame (see tables 1 and 3) is transmitted when the transmission pro- cedure of a previous service is terminated After the transmission of the frame a line idle interval is provided whose length is specified as an interval between frames upon dete


    注意事项

    本文(EN 60870-5-2-1993 en Telecontrol Equipment and Systems Part 5 Transmission Protocols Section 2 Link Transmission Procedures《遥控设备和系统 第5部分 传输协议 第2节 链接传输程序(IEC 870 5 2-1992)》.pdf)为本站会员(bowdiet140)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开