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IEC 61158-3-12

Industrial communication networks – Fieldbus specifications – Part 3-12: Data-link layer service definition – Type 12 elements

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Organization: IEC
Publication Date: 1 April 2019
Status: active
Page Count: 48
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

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 International standard defines in an abstract way the externally visible service provided by the Type 12 fieldbus data-link layer in terms of

a) the primitive actions and events of the service;

b) the parameters associated with each primitive action and event, and the form which they take;

c) the interrelationship between these actions and events, and their valid sequences.

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

• the Type 12 fieldbus application layer at the boundary between the application and data-link layers of the fieldbus reference model;

• systems management at the boundary between the data-link layer and systems management of the fieldbus reference model.

Specifications

The principal objective of this document is to specify the characteristics of conceptual datalink 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

a) the sizes and octet ordering of various multi-octet service parameters, and

b) the correlation of paired request and confirm, or indication and response, primitives.

Conformance

This document does not specify individual implementations or products, nor does it 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 fulfils the Type 12 data-link layer services defined in this document.

Document History

IEC 61158-3-12
April 1, 2019
Industrial communication networks – Fieldbus specifications – Part 3-12: Data-link layer service definition – Type 12 elements
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...
August 1, 2014
Industrial communication networks – Fieldbus specifications – Part 3-12: Data-link layer service definition – Type 12 elements
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...
July 1, 2010
Industrial communication networks – Fieldbus specifications – Part 3-12: Data-link layer service definition – Type 12 elements
Overview 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...
December 1, 2007
Industrial communication networks – Fieldbus specifications – Part 3-12: Data-link layer service definition – Type 12 elements
A description is not available for this item.

References

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