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  • BSI
    BS EN 61158-4-20:2014 Industrial communication networks. Fieldbus specifications - Data-link layer protocol specification. Type 20 elements
    Edition: 2014
    $500.66
    / user per year

Description of BS EN 61158-4-20:2014 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
StatusDefinitive
Publication Date2014-11-30
Identical National Standard OfIEC 61158-4-20:2014, EN 61158-4-20:2014
DescriptorsCommunication networks, Interfaces (data processing), Data transmission, Automatic control systems, Bus networks, Industrial, Process control, Computer networks, Open systems interconnection, Fieldbus, Data link layer (OSI), Communication procedures
ICS35.110 Networking, 35.100.20 Data link layer, 25.040.40 Industrial process measurement and control
CommitteeGEL/65/3
ISBN978 0 580 79448 3
PublisherBSI
Pages46

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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