TSN integrated as layer 2 in Profinet
Specification of Profinet with TSN completed
The user organization Profibus & Profinet International (PI) has completed the integration of TSN as technology for layer 2 - the data link layer - into the Profinet architecture. The Profinet specification V2.4 has been completed and is available for download on the PI website.
According to PI, both manufacturers and users can thus implement the advantages of TSN, such as future-proof IEEE Ethernet technology with higher bandwidth, deterministics, flexible network configuration and a wide variety of chips, in an interoperable manner. The user interface, i.e. the use of I/O data, diagnostics and parameterization, remains unchanged because the new TSN mechanisms essentially work in the underlying communication layers. This makes it easier for users to get started with the new technology.
With the collaboration of experts from many companies, the specification was worked out over the course of a year in an intensive development and review process. In addition, initial implementations and concepts for certification were developed in parallel at an early stage. This allowed the stability of the specification to be tested and demonstrated at trade fairs. According to PI, a precise and complete technical description is ensured. A guideline is also available that explains the basics of TSN in a few pages to make it as easy as possible to understand how it works.
The Profinet specification 2.4 and IEEE specifications are essential for developers of the basic hardware and firmware technology. The device manufacturers then use the corresponding stacks or modules, so they do not have to understand the details or even implement them themselves, as was previously the case. This makes it easy for device manufacturers to add TSN to their existing Profinet portfolio. The specification is to be updated in an annual maintenance process in order to integrate new customer requirements, field experience or technology developments in an open and verifiable manner.
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