DIN EN 61158-4-17:2008
工业通讯网络.现场总线规范.第4-17部分:数据联络层协议规范.17型元件.仅为CD-ROM

Industrial communication networks - Fieldbus specifications - Part 4-17: Data-link layer protocol specification - Type 17 elements (IEC 61158-4-17:2007); English version EN 61158-4-17:2008, only on CD-ROM

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标准号

DIN EN 61158-4-17:2008

发布

2008年

发布单位

德国标准化学会

当前最新

DIN EN 61158-4-17:2008

 

 

引用标准

IEC 61158-3-17 IEEE Std 802.3ab ISO/IEC 10731 ISO/IEC 7498 ISO/IEC 8802-3 RFC 1112 RFC 2236 RFC 768 RFC 791 RFC 792 RFC 826 RFC 894

被代替标准

DIN EN 61158-400:2006 DIN EN 61158-4:2005

适用范围

1.1 General The data-link layer provides basic time-critical messaging communications between devices in an automation environment. This protocol provides communication opportunities to all participating data-link entities a) in a cyclic asynchronous manner, sequentially to each of those data-link entities, and b) in a synchronous manner, either cyclically or acyclically, according to a pre-established schedule. The specified protocol also provides means of changing the set of participating data-link entities and of modifying the set of scheduled communications opportunities. When the set of scheduled communications opportunities is null, the distribution of communication opportunities to the participating data-link entities is completely asynchronous. Thus this protocol can be characterized as one which provides access asynchronously but with a synchronous overlay. 1.2 Specifications This standard specifies a) procedures for the timely transfer of data and control information from one data-link user entity to a peer user entity, and among the data-link entities forming the distributed data-link service provider; b) the structure of the fieldbus DLPDUs used for the transfer of data and control information by the protocol of this standard, and their representation as physical interface data units. 1.3 Procedures The procedures are defined in terms of a) the interactions between peer DL-entities (DLEs) through the exchange of fieldbus DLPDUs; b) the interactions between a DL-service (DLS) provider and a DLS-user in the same system through the exchange of DLS primitives; c) the interactions between a DLS-provider and a Ph-service provider in the same system through the exchange of Ph-service primitives. 1.4 Applicability These procedures are applicable to instances of communication between systems which support time-critical communications services within the data-link layer of the OSI or fieldbus reference models, and which require the ability to interconnect in an open systems interconnection environment. Profiles provide a simple multi-attribute means of summarizing an implementation’s capabilities, and thus its applicability to various time-critical communications needs.

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