Hivatkozási szám

MSZ EN 61158-4-22:2015

Dokumentumazonosító

159522

Cím

Ipari adatközlő hálózatok. A terepi busz előírásai. 4-22. rész: Az adatkapcsolati réteg protokoll-előírása. 22-es típusú elemek (IEC 61158-4-22:2014)

Angol cím

Industrial communication networks. Fieldbus specifications. Part 4-22: Data-link layer protocol specification. Type 22 elements (IEC 61158-4-22:2014)

Alkalmazási terület

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 synchronously-starting cyclic manner, according to a pre-established schedule, and b) in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those data-link entities. Thus this protocol can be characterized as one which provides cyclic and acyclic access asynchronously but with a synchronous restart of each cycle. 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 datalink 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. 1.5 Conformance This standard also specifies conformance requirements for systems implementing these procedures. This part of IEC 61158 does not contain tests to demonstrate compliance with such requirements.

ICS

25.040.40 Ipari folyamatok mérése és vezérlése

35.100.20 Adatkapcsolati réteg

35.110 Hálózatba szervezés

Műszaki Bizottság

A szabvány nyelve

angol

Az érvényesség kezdete

2015-03-01

Forrás

idt EN 61158-4-22:2014; idt IEC 61158-4-22:2014

Előd

MSZ EN 61158-4-22:2013

Utód

Módosítás

Kiegészítő információk

SZK-közlemények

Kapcsolódó európai jogszabály

A szabvány

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