BS EN 61158-4-3:2014

What is BS EN 61158-4-3 – Type 3 elements of data-link layer protocol about?  

BS EN 61158-4-3 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 61158-4-3 provides communication opportunities to a pre-selected “master” subset of datalink entities in a cyclic asynchronous manner, sequentially to each of those data-link entities. 

Other data-link entities communicate only as permitted and delegated by those master datalink entities.  

Who is BS EN 61158-4-3 – Type 3 elements of data-link layer protocol for? 

BS EN 61158-4-3 on industrial communication networks is useful for: 

• The IT industry / Software programmers   
• Internet engineering task forces    
• The automation industry  
• Networking sectors  
• Implementors and designers of industrial automation systems 

Why should you use BS EN 61158-4-3 – Type 3 elements of data-link layer protocol?  

Profiles provide a simple multi-attribute means of summarizing an implementation’s capabilities, and thus its applicability to various time-critical communications needs. 

BS EN 61158-4-3 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, the guidance BS EN 61158-4-3 provides you with a means of sharing the available communication resources in a fair manner. 

You can view the latest version of this standard here.