RO
SR EN 61158-4-19:2008
Industrial communication networks - Fieldbus specifications -- Part 4-19: Data-link layer protocol specification - Type 19 elements
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.
Status :
Withdrawn
Approval date : 9/30/2008
Publish date : 10/2/2008
Withdrawal date : 3/28/2015
Number of pages : 81
ICS : 25.040.40 Industrial process measurement and control,35.100.20 Data link layer
Technical Committee : 23 - Industrial -process measurement and control
- Replaces SR EN 61158-4:2004
- Replaced by SR EN 61158-4-19:2012