BAS EN 61158-4-2:2011
Industrijske komunikacione mreže- Fieldbus specifikacije – Dio 4-2: Specifikacije protokola nivoa veze – Elementi tipa 2
Opšte informacije
Status: Povučen
Broj strana: 228
Jezik: Engleski
Izdanje: 1.
Metoda usvajanja: Proglašavanje
Datum objave: 30.05.2011
Tehnički komitet:
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Apstrakt
IEC 61158-4-2:2007 describes the protocol that provides communication opportunities to all participating data-link entities, sequentially and in a cyclic synchronous manner. Foreground scheduled access is available for time-critical activities together with background unscheduled access for less critical activities. This protocol optimizes each access opportunity by concatenating multiple DLSDUs and associated DLPCI into a single DLPDU, thereby improving data transfer efficiency for data-link entities that actively source multiple streams of data. This first edition and its companion parts of the IEC 61158-4 subseries cancel and replace IEC 61158-4:2003. This edition of this part constitutes a minor revision. This part and its companion Type 2 parts also cancel and replace IEC/PAS 62413, published in 2005. This edition of IEC 61158-4 includes the following changes:<br />
- deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data link layer, for lack of market relevance;<br />
- addition of new types of fieldbuses;<br />
- division of this part into multiple parts numbered -4 1, -4 2, , -4-19. This bilingual version (2014-07) corresponds to the English version, published in 2007-12.
Životni ciklus
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Izvorni dokument i stepen usklađenosti
- EN 61158-4-2:2008, identičan
- IEC 61158-4-2:2007, identičan