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.
BS EN 61158-4-20 on industrial communication networks is useful for:
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:
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.
EN 61158-4-20:2014
IEC 61158-4-20:2014