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  • BSI
    BS EN 61158-4-7:2008 Industrial communication networks. Fieldbus specifications - Data-link layer protocol specification. Type 7 elements
    Edition: 2014
    $569.57
    / user per year

Description of BS EN 61158-4-7:2008 2014

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

  1. in a synchronously-starting cyclic manner, according to a pre-established schedule, and

  2. 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

  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 interactions 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 standard also specifies conformance requirements for systems implementing these procedures. This part of this standard does not contain tests to demonstrate compliance with such requirements.



Standard NumberBS EN 61158-4-7:2008
TitleIndustrial communication networks. Fieldbus specifications - Data-link layer protocol specification. Type 7 elements
StatusUnder Review
Publication Date2014-05-31
ReplacesBS EN 61158-3:2004, DD IEC/PAS 62573:2008, BS EN 61158-6:2004, BS EN 61158-4:2004, BS EN 61491:1999, PD CLC/TR 61158-1:2010, BS EN 61158-5:2004
Identical National Standard OfEN 60703:2009, EN 61158-4-7:2008/Cor1, IEC 61158-4-7:2007/COR1:2014
CorrectsBS EN 61158-4-7:2008
DescriptorsIndustrial, Communication procedures, Interfaces (data processing), Bus networks, Data transmission, Communication networks, Data link layer (OSI), Open systems interconnection, Fieldbus, Process control, Computer networks, Automatic control systems
ICS35.100.20 Data link layer, 25.040.40 Industrial process measurement and control
CommitteeGEL/65/3
ISBN978 0 580 85821 5
PublisherBSI
Pages122

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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