IEC 61158-3-8:2007 defines in an abstract way the externally visible service provided by the Type 8 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. This first edition and its companion parts of the IEC 61158-3 subseries cancel and replace IEC 61158-3:2003. This edition of this part constitutes an editorial revision. This edition includes the following changes:- deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data-link layer, for lack of market relevance;- addition of new types of fieldbuses;- division of this part into multiple parts numbered 3-1, 3-2,..., 3-19. This bilingual version (2013-07) corresponds to the monolingual English version, published in 2007-12.
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