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IEC 61158-6-21 Ed. 2.0 en:2019

Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification – Type 21 elements
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International Electrotechnical Commission Logo

IEC 61158-6-21 Ed. 2.0 en:2019

Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification – Type 21 elements

PUBLISH DATE 2019
PAGES 60
IEC 61158-6-21 Ed. 2.0 en:2019
Industrial communication networks - Fieldbus specifications - Part 6-21: Application layer protocol specification – Type 21 elements
IEC 61158-6-21:2019 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 2 fieldbus. 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 specifies interactions between remote applications and defines the externally visible behavior provided by the Type 2 fieldbus application layer. The purpose of this document is to define the protocol provided to
a) define the wire-representation of the service primitives defined in this document, and
b) define the externally visible behavior associated with their transfer. This document specifies the protocol of the Type 2 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545).
This second edition includes the following significant technical changes with respect to the previous edition:
- added WriteAndRead service;
- miscellaneous editorial corrections.
SDO IEC: International Electrotechnical Commission
Document Number IEC 61158
Publication Date June 1, 2019
Language en - English
Page Count 60
Revision Level 2.0
Supercedes
Committee 65C
Publish Date Document Id Type View
June 1, 2019 Revision
June 1, 2019 IEC 61158-6-21 Ed. 2.0 en:2019 Revision
June 5, 2024 Revision
Not Available IEC 61158-6-21 Ed. 2.0 b:2019 Revision