BS EN 61158-4-20:2014 - Industrial communication networks. Fieldbus specifications. Data-link layer protocol specification. Type 20 elements

BS EN 61158-4-20:2014

Industrial communication networks. Fieldbus specifications. Data-link layer protocol specification. Type 20 elements

Status : Current   Published : November 2014



1.1 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

1.2 Specifications

This International Standard specifies

  1. 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;

  2. 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

  1. the inter actions between peer DL-entities (DLEs) through the exchange of fieldbus DLPDUs;

  2. the interactions between a DL-service (DLS) provider and a DLS-user in the same system through the exchange of DLS primitives;

  3. 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 International Standard also specifies conformance requirements for systems implementing these procedures. This standard does not contain tests to demonstrate compliance with such requirements.

Standard NumberBS EN 61158-4-20:2014
TitleIndustrial communication networks. Fieldbus specifications. Data-link layer protocol specification. Type 20 elements
Publication Date30 November 2014
Normative References(Required to achieve compliance to this standard)ISO/IEC 10731, ISO/IEC 7498-1, ISO/IEC 7498-3, IEC 61158-2:2014, IEC 61158-6-20:2014
Informative References(Provided for Information)EN 61158-5-20:2014, EN 61158-3-20:2014, IEC 62591:2010, IEC 61158-3-20:2014, EN 61158-1:2014, EN 61784-1, IEC 61158-1:2014, EN 61784-2, IEC 61784-2, EN 62591:2010, IEC 61158-5-20:2014, IEC 61784-1
International RelationshipsEN 61158-4-20:2014,IEC 61158-4-20:2014
DescriptorsCommunication procedures, Data link layer (OSI), Fieldbus, Open systems interconnection, Computer networks, Process control, Industrial, Bus networks, Automatic control systems, Data transmission, Interfaces (data processing), Communication networks
Title in FrenchRéseaux de communication industriels. Spécifications des bus de terrain. Spécification du protocole de la couche liaison de données. Éléments de type 20
Title in GermanIndustrielle Kommunikationsnetze. Feldbusse. Protokollspezifikation des Data Link Layer (Sicherungsschicht). Typ 20-Elemente
ISBN978 0 580 79448 3
File Size2.177 MB

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