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CEI EN IEC 61158-4-4

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

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Organization: CEI
Publication Date: 1 November 2019
Status: active
Page Count: 56
ICS Code (Networking): 35.110
ICS Code (Data link layer): 35.100.20
ICS Code (Industrial process measurement and control): 25.040.40
scope:

General

The data-link layer provides basic time-critical messaging communications between devices in an automation environment.

This protocol provides a means of connecting devices through a partial mesh network, such that most failures of an interconnection between two devices can be circumvented. In common practice the devices are interconnected in a non-redundant hierarchical manner reflecting application needs

Specifications

This document 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 document, 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 document also specifies conformance requirements for systems implementing these procedures. This document does not contain tests to demonstrate compliance with such requirements.

Document History

CEI EN IEC 61158-4-4
November 1, 2019
Industrial communication networks - Fieldbus specifications Part 4-4: Data-link layer protocol specification - Type 4 elements
General The data-link layer provides basic time-critical messaging communications between devices in an automation environment. This protocol provides a means of connecting devices through a...
February 1, 2016
Industrial communication networks - Fieldbus specifications Part 4-4: Data-link layer protocol specification - Type 4 elements
General The data-link layer provides basic time-critical messaging communications between devices in an automation environment. This protocol provides a means of connecting devices through a...
November 1, 2008
Industrial communication networks - Fieldbus specifications Part 4-4: Data-link layer protocol specification - Type 4 elements
Questa prima edizione della EN 61158-4-4 sostituisce parzialmente le precedenti Norme EN 61158-4 :2004 e IEC/PAS 62412:2005. Pur non contenendo rilevanti modifiche di natura tecnica, in questa...

References

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