CEI EN 61158-4-22

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CEI EN 61158-4-22

2016

Most Recent

Industrial communication networks – Fieldbus specifications Part 4-22: Data-link layer protocol specification – Type 22 elements

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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.

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.

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.

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.

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.

CEI EN 61158-4-22
STANDARD INFO:
Standard NameCEI EN 61158-4-22
ScopeIndustrial communication networks - Fieldbus specifications Part 4-22: Data-link layer protocol specification - Type 22 elements
PublisherCEI - Comitato Elettrotecnico Italiano
LanguagesEnglish
State[ Active ]
Publication Year2016
Most recent VersionMOST RECENT
Whether to be replaced
Addendum
FILE INFO:
Edition16
File Size1 file , 1.6 MB
Number of Pages72
Published02/01/2016
This document does not provide a preview.
CEI EN 61158-4-22
HistoryPublisher Year
CEI EN 61158-4-222016Current
CEI EN 61158-4-222013

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