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IEC 61158-3-12 Ed. 2.0 en:2010
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IEC 61158-3-12 Ed. 2.0 en:2010 Industrial communication networks - Fieldbus specifications - Part 3-12: Data-link layer service definition - Type 12 elements
standard by International Electrotechnical Commission, 07/28/2010
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IEC 61158-3-12:2010(E) provides common elements for basic time-critical messaging communications between devices in an automation environment. 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. It defines in an abstract way the externally visible service provided by the Type 12 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;
- the interrelationship between these actions and events, and their valid sequences.
This second edition cancels and replaces the first edition published in 2007 and constitutes a technical revision. The main changes with respect to the previous edition are editorial improvements.