search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
FEATURE COMMUNICATIONS & NETWORKS A TIME-SENSITIVE APPROACH TO DATA DELIVERY


critical messages are assigned to a queue and can no longer be prioritised. TSN technology can address these issues


CC-Link IE TSN combines the benefit of a well- developed open Ethernet framework with Gigabit bandwidth along with the added capabilities of IEEE 802.1 TSN technologies


Managing and prioritising data delivery is a crucial element of the Smart Factory envisioned by Industry 4.o. John Browett, general manager of CLPA Europe, looks at how TSN can address the needs of effective data delivery and support manufacturers All these aspects are challenging for


A


s Industry 4.0 drives the adoption of cutting-edge machines, robots and


sensors in manufacturing, network technologies that facilitate their communications to create an interconnected smart factory become even more crucial. Time-Sensitive Networking (TSN) offers a key tool to future-proof industrial Ethernet for the ‘Factories of the Future’.1 The Smart Factory envisioned by


Industry 4.0 can help manufacturing industries boost their productivity, efficiency, product quality and consistency. This is possible by having machinery and equipment that improves industrial processes through automation, communications and self-optimisation. To do so, large volumes of data need to


be gathered from a broad range of operational technology (OT) systems, processed efficiently – ideally via edge computing, and then transmitted to top floor IT infrastructures. Therefore, Smart Factories need a networking technology that does more than handling increasingly greater data traffic. The network of the future must be able


to bridge IT and OT. In order to successfully merge field and higher enterprise levels, smart industrial networks should be able to prioritise any time-critical control messaging, as well as assign bandwidth in a faster, more controlled and accurate manner.


42 JULY/AUGUST 2019 | PROCESS & CONTROL 1


most industrial Ethernet networks. In particular, within the field level, traditional industrial Ethernet networks often use bandwidth hungry over-provisioning approaches to transfer both time-critical and non-urgent data. They may also work on non-standard


“Best Effort” data delivery systems to optimise determinism. These use Class of Service (CoS) mechanisms to guarantee Best Effort bounded end-to-end latency of time-sensitive data traffic. However, CoS could also be responsible for the delay of urgent process data in these set- ups. In fact, when the transmission of a non-urgent message is underway, time-


by offering an Ethernet standard that implements deterministic capabilities on an ISO/OSI (International Standards Organization/Open Systems Interconnection) Data Link Layer. More precisely, the Institute of Electrical and Electronics Engineers (IEEE) standards 802.1 governing TSN functionalities defines a number of traffic shaping and scheduling tools that guarantee the efficient delivery of any kind of data on an Ethernet network. A key element, defined in IEEE 802.1Qbv,


is TSN’s Time-Aware Scheduler (TAS). This is a gate driver that priorities Ethernet frames on the basis of their transmission time. When urgent cyclic data need to be transferred, TAS temporarily interrupts the transmission of non-urgent traffic. As a result, time-sensitive data can be delivered within the reserved time slots for high-priority traffic. IEE802.1Qbv also specifies a length-


'Factories of the Future' is the European Union's €1.15 billion public- private partnership for advanced manufacturing research and innovation. It is the EU's main programme for realising the next industrial revolution: materialising Factories 4.0. EFFRA


TSN’s Time-Aware Scheduler (TAS) allows time-sensitive data to be delivered within the reserved time slots for high-priority traffic


aware scheduling mechanism to optimise bandwidth usage. When the scheduler receives a message that needs to be transmitted, the overall length of the frame is checked. If the frame can fit without affecting high priority traffic, the scheduler sends this information. If not, the message is queued or, as defined by IEEE 802.1Qbu and IEEE 802.3br, can be transmitted into two separate parts (frame pre-emption). Thanks to these different IEEE 802.1


sub-standards and tools, TSN can enhance the reliability of traditional industrial Ethernet protocols, and tailor both bandwidth and latency based on the specific application requirements. Consequently, critical and non-critical data traffic can efficiently coexist. The established open industrial Ethernet


technology CC-Link IE has adopted TSN. CC-Link IE TSN combines the benefit of a well-developed open Ethernet framework with Gigabit bandwidth along with the added capabilities of IEEE 802.1 TSN technologies. The system is built around ISO/OSI


Layers 3 to 7, and adopts IEEE 802.1AS and IEEE 802.1Qbv standards concerning synchronisation and scheduled traffic. By choosing the CLPA and CC-Link IE


TSN, end users can rely on network solutions at the forefront of automation. Industries can adapt to manufacturing demands and turn their factories into smart, interconnected systems.


The CC-Link Partner Association (CLPA) eu.cc-link.org





Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60