IEC 61158-4-18 Ed. 1.0被替代
Industrial communication networks - Fieldbus specifications Part 4-18: Data-link layer protocol specification - Type 18 elements
出版：International Electrotechnical Committee
专家解读视频
It provides basic time-critical messaging communications between devices in an automation environment. This protocol provides communication opportunities to all participating data-link entities in a synchronously-starting cyclic manner, according to a pre-established schedule, and in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those data-link entities. Thus this protocol can be characterized as one which provides cyclic and acyclic access asynchronously but with a synchronous restart of each cycle. It includes the following significant changes with respect to the previous edition 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.
I.S. EN 61158-4-18:2008 - Identical
BS EN 61158-4-18:2008 - Identical
DIN EN 61158-4-18 (2008-09) - Identical
NEN EN IEC 61158-4-18:2008 - Identical
OVE/ONORM EN 61158-4-18:2008 - Identical
PN EN 61158-4-18:2008 - Identical
