BS EN 61158-3-14:2014

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Industrial communication networks. Fieldbus specifications – Data-link layer service definition. Type 14 elements

Published By	Publication Date	Number of Pages
BSI	2014	26

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Description

1.1 General

This part of IEC 61158 provides common elements for basic time-critical messaging communications between devices in an automation environment. The term “time-critical” is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life.

This standard defines in an abstract way the externally visible service provided by the Type 14 fieldbus data-link layer in terms of

the primitive actions and events of the service;
the parameters associated with each primitive action and event, and the form which they take; and
the interrelationship between these actions and events, and their valid sequences.

The purpose of this standard is to define the services provided to

the Type 14 fieldbus application layer at the boundary between the application and data-link layers of the fieldbus reference model, and
systems management at the boundary between the data-link layer and systems management of the fieldbus reference model.

1.2 Specifications

The principal objective of this standard is to specify the characteristics of conceptual data-link layer services suitable for time-critical communications, and thus supplement the OSI Basic Reference Model in guiding the development of data-link protocols for time-critical communications. A secondary objective is to provide migration paths from previously-existing industrial communications protocols.

This specification may be used as the basis for formal DL-Programming-Interfaces. Nevertheless, it is not a formal programming interface, and any such interface will need to address implementation issues not covered by this specification, including

the sizes and octet ordering of various multi-octet service parameters, and
the correlation of paired request and confirm, or indication and response, primitives.

1.3 Conformance

This standard does not specify individual implementations or products, nor do they constrain the implementations of data-link entities within industrial automation systems.

There is no conformance of equipment to this data-link layer service definition standard. Instead, conformance is achieved through implementation of the corresponding data-link protocol that fulfills the Type 14 data-link layer services defined in this standard.

PDF Catalog

PDF Pages	PDF Title
4	Foreword Endorsement notice
5	Annex ZA (normative) Normative references to international publications with their corresponding European publications
6	English CONTENTS
7	INTRODUCTION
8	1 Scope 1.1 General 1.2 Specifications 1.3 Conformance
9	2 Normative references 3 Terms, definitions, symbols, abbreviations and conventions 3.1 Reference model terms and definitions
11	3.2 Service convention terms and definitions
12	3.3 Data-link service terms and definitions
13	Figures Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DLaddresses
15	3.4 Symbols and abbreviations
17	3.5 Common conventions
18	4 DL service and concept 4.1 General Figure 2 – Communication model
19	4.2 Services provided by the DLL 5 DL-management services 5.1 Overview 5.2 Non-periodic data annunciation
20	Figure 3 – Sequence of non-periodic data annunciation service and end of non-periodic data annunciation service Tables Table 1 – Non-periodic data annunciation primitives and parameters
21	5.3 EndofNonPeriodicDataSendingAnnunciation service Table 2 – EndofNonPeriodicDataSending service primitives and parameters
22	5.4 DL-management for FRT applications Table 3 – DL-management service primitives and parameters
24	Bibliography

Additional information

Status	Definitive
Pages	26
Publication Date	2014-10-31
ISBN	978 0 580 79367 7
Standard Number	BS EN 61158-3-14:2014
Title	Industrial communication networks. Fieldbus specifications – Data-link layer service definition. Type 14 elements
Identical National Standard Of	EN 60613:2010, IEC 61158-3-14:2014, EN 61158-3-14:2014
Replaces	BS EN 61158-3-14:2012
Descriptors	Interfaces (data processing), Data link layer (OSI), Communication networks, Fieldbus, Industrial, Communication procedures, Process control, Bus networks, Computer networks, Data transmission, Automatic control systems, Open systems interconnection
Publisher	BSI
Committee	GEL/65/3
ICS Codes	35.110 - Networking

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BS EN 61158-3-14:2014

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