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COMMUNICATIONS & NETWORKS


THE CRUCIAL ROLE OF TSN IN THE FUTURE


Arno Stock, business development


manager at CC-Link Partner Association (CLPA) member Renesas Electronics, looks at what TSN can offer and how it is shaping the future of industrial Ethernet


needs by providing innovative, beneficial features. Companies are well aware of this potential, and a lot is happening to fully realise the TSN-driven Connected Industries of the Future. TSN is a promising technology that will allow


T


industrial Ethernet to reach new levels. Operating at Layer 2 of the Open Systems Interconnection (OSI) model, it enhances standard Ethernet as we know it by making it deterministic by design. This characteristic, in turn, will benefit end users in a variety of industries by offering the ability to merge different types of data traffic, leading to more flexible and collaborative environments. At the same time, this creates simplified, more economical network architectures as well as unified hardware and software systems. Therefore, the crucial role of TSN in the


Connected Industries of the Future is clear. This technology is the precondition needed to support key Industry 4.0 applications and trends, such as Edge and Cloud computing. In addition to these most obvious


advantages, an instrumental feature of TSN is its continuity with existing network technology. In effect, while it offers enhanced capabilities, it does so by evolving conventional Ethernet rather than by substantially disrupting the status quo. As a result, businesses can seamlessly transition towards TSN-compatible industrial Ethernet systems. This also means that TSN is compatible with


legacy standards. Furthermore, it can be combined with additional solutions that are already available for conventional industrial Ethernet, such as gigabit bandwidth, which is key to support ever-increasing data throughput. In addition, it can accommodate


ime-Sensitive Networking (TSN) is preparing industrial Ethernet to support tomorrow’s industrial communications


the higher number of network devices and nodes resulting from


converged architectures. Additional advantages of mixing TSN and


gigabit Ethernet include the ability to shorten cycle times, increase the accuracy and precision of control loops as well as strengthening the ability of a network to transfer various types of data, such as video. Such a solution can also reduce the complexity of distributed control systems, as it is possible to reliably move more functions to a single controller, also making the intended applications more robust as well as easier to set up and maintain. The multiple benefits of TSN are evident to


machine builders and end users. In particular, Renesas is noticing a high level of interest from its customers, who are aware the technology will be a must in the years to come. An aspect appealing to many is the standardisation/ simplification of protocols, enabling the connection of all parts within an enterprise. In order to successfully implement TSN, it is


necessary to use a network technology with higher-level protocols, as these are needed to complete the OSI reference model and support TSN applications. An example is the open industrial Ethernet CC-Link IE TSN. In addition, companies require suitable hardware that can utilise this Layer 2 technology, such as Renesas’ R-IN32M4-CL3 large scale integration (LSI) that leverages CC-Link IE TSN. Driver-level support is also important, as real-time TSN- compatible systems require a close interaction between low-level driver software


24 JULY/AUGUST 2021 | PROCESS & CONTROL


and hardware equipment. To address these aspects with leading


solutions, automation vendors need to team up to deliver devices with TSN capabilities that meet customers’ expectations and needs. Being part of an extensive partnership network, such as the CLPA, is thus beneficial, as it offers a forum where solution providers come together to drive the development and consolidation of key automation products. A number of major milestones have been


reached to support the use of TSN. In particular, the IEEE 802.1 standards defining the technology are now complete and accessible. Also, the first network solutions have been released to the market, namely CC-Link IE TSN – the first open Ethernet that combines gigabit bandwidth and TSN capabilities. Finally, the first prototypes and complete


products have already appeared, with actual devices available and ready for use now. More testbeds are also ongoing or planned to take place in the short term. The sector is working towards the


finalisation of IEEE profiles, particularly for industrial automation as well as the development of new applications for wider use, not confined solely to industrial settings. To support the global adoption of TSN, it will soon be essential to set up unified conformance testing to make sure that different solutions are interoperable, and so utilise the full potential of TSN. Open technologies, such as CC-Link IE TSN, are therefore likely to be favoured.


CLPA Europe eu.cc-link.org


The transition towards TSN will be particularly exciting, as it is a natural evolution of Ethernet that will support its continuous improvement


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