BS EN 61158-4-1:2014

What is BS EN 61158-4-1 – Type 1 elements of data-link layer protocol about?  

BS EN 61158-4-1 is one 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. 

BS EN 61158-4-1 provides basic time-critical messaging communications between devices in an automation environment. 

BS EN 61158-4-1 provides the data-link service by making use of the services available from the physical layer.  

BS EN 61158-4-1 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 61158-4-1 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 61158-4-1 can be characterized as one which provides access asynchronously but with a synchronous overlay. 

Who is BS EN 61158-4-1 – Type 1 elements of data-link layer protocol for? 

BS EN 61158-4-1 on industrial communication networks is useful for: 

• IT industry /software programmers 
• Internet engineering task forces  
• Internet service providers  
• Telecommunication companies 
• The automation industry 
• Networking sectors 

Why should you use BS EN 61158-4-1 – Type 1 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 61158-4-1 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 BS EN 61158-4-1, and their representation as physical interface data units 

Overall, the guidance of BS EN 61158-4-1 helps you to gain a better understanding of type-1 elements of the data-link layer protocol. This helps you to implement industrial communication networks effectively.