BS EN 61158-4-17:2008

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

Overall, BS EN 61158-4-17 guidelines help you to integrate type 17 data link layer protocol in your industrial communication network and enhance its time-critical response time.