What is BS EN 61158-4-20 – Type 20 elements of data-link layer protocol about?
BS EN 61158-4-20 is one of a series produced to facilitate the interconnection of automation system components. BS EN 61158-4-20 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 61158-4-20 provides a means of connecting devices through a partial mesh network, such that most failures of an interconnection between two devices can be circumvented. In common practice, the devices are interconnected in a non-redundant hierarchical manner reflecting application needs.
Who is BS EN 61158-4-20 – Type 20 elements of data-link layer protocol for?
BS EN 61158-4-20 on industrial communication networks is useful for:
- IT industry /software programmers
- Internet engineering task forces
- Internet service providers
- Telecommunication companies
- The automation industry
Why should you use BS EN 61158-4-20 – Type 20 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.
The LLC (logical link control) sublayer described in BS EN 61158-4-20 provides the higher-level functionality of:
- Managing all DLE (data-link entity) interactions with the DLS (data-link service) user, converting all DLS-user request and response primitives into the necessary sequence of DLE operations, and generating DLS user indication and confirm primitives where appropriate
- Preparation of the DLPDU (data link protocol data unit) for transmission
- Parsing of the received DLPDU
- Error detection
Overall, the guidance of BS EN 61158-4-20 helps you to gain a better understanding of type-20 elements of the data-link layer protocol. This helps you to implement industrial communication networks effectively.
