What is BS EN 61158-4-17 - Type 17 elements of data-link layer protocol about?
BS EN 61158-4-17 is part of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the “three-layer” fieldbus reference model described in IEC 61158-1.
The data-link layer provides basic time-critical messaging communications between devices in an automation environment.
BS EN 61158-4-17 provides communication opportunities to all participating data-link entities:
- In a cyclic asynchronous manner, sequentially to each of those data-link entities, and
- In a synchronous manner, either cyclically or acyclically, according to a pre-established schedule.
BS EN 61158-4-17 protocol also provides means of changing the set of participating data-link entities and of modifying the set of scheduled communications opportunities. When the set of scheduled communications opportunities is null, the distribution of communication opportunities to the participating data-link entities is completely asynchronous.
Thus BS EN 61158-4-17 can be characterized as one which provides access asynchronously but with a synchronous overlay.
Who is BS EN 61158-4-17 - Type 17 elements of data-link layer protocol for?
BS EN 61158-4-17 on industrial communication networks is useful for:
- IT industry / Software programmers
- Automation industry
- Networking sectors
- Implementors and designers of industrial automation systems
Why should you use BS EN 61158-4-17 - Type 17 elements of data-link layer protocol?
The data-link protocol provides the data-link service by making use of the services available from the physical layer.
BS EN 61158-4-17 specifies:
- Procedures for the timely transfer of data and control information from one data-link user entity to a peer user entity, and among the data-link entities forming the distributed datalink service provider
- The structure of the fieldbus DLPDUs used for the transfer of data and control information by the protocol of this standard, and their representation as physical interface data units
