In the past, the shortcomings of the closed industrial communication architecture, Industrial 4.0 is difficult to play here, so the industrial Ethernet network has received much attention. Among them, EtherCAT has been booming in recent years, and TSN is a sudden rise. Following the cooperation between EtherCAT and OPC UA to further strengthen the information transmission technology of the factory OT and enterprise IT, recently at the Hannover Messe in 2018, TSN also strengthened the layout with OPC UA, through more players. Helps add firewood to the new combination.
The new state of Industry 4.0 is to break the closed manufacturing site in the past, so communication technology that allows machines to communicate with each other is particularly important, which makes the fieldbus-based communication architecture stand out. The lack of sex, and therefore the industrial Ethernet network has once again received market attention.
Although the growth of EtherCAT is accelerating, the market is gradually moving closer to it, but another Ethernet standard TSN is closely following. Although EtherCAT is based on Ethernet technology, its communication architecture is still different from that of general commercial Ethernet. If you import EtherCAT, you need to re-route. But TSN can synchronize all nodes through the existing network architecture without having to reroute the industrial IoT.
The requirements of the manufacturing site for communication are stable, reliable and real-time, and can not tolerate a slight delay affecting the operation of the equipment. Although the Ethernet network is a common communication protocol standard for general households, enterprises or data centers, its real-time performance after entering the industrial field. The problem still leaves the manufacturer unchanged. However, fortunately, most of the industrial Ethernet has reached the requirements of manufacturers.
The TSN cuts out the proprietary channel in the Ethernet bandwidth and prioritizes critical data packets during transmission, which means that critical data does not have to wait for all non-critical data to complete before it is transmitted, thus ensuring a faster transmission path.
Industrial Ethernet networks still face some challenges in the future. Although it is more than enough for machine motion control at this stage, when cloud computing, big data technology, and even artificial intelligence penetrate into the industrial field, industrial communication can no longer be limited between machines and sensors, or between machines and machines. It extends to richer connections such as machines, people, clouds and applications, and therefore requires a greater amount of data transmission and processing requirements. How to deal with and how to achieve more accurate real-time transmission will be the ongoing challenge of Industry 4.0 in the future. .
With the development of better industrial intelligence, the combination of TSN and OPC UA has also added to the industrial communications market. OPC UA is the communication protocol of the Industrial IoT Open Platform defined by the OPC Foundation. This standard makes data mining, information modeling and transmission communication between the underlying factories and high-end enterprises more secure and reliable. Used to communicate between devices and devices, devices and enterprises, and devices from different vendors.
In the factory data collection, transmission or production operation, it is necessary to collect the machine state, production energy consumption and production related data on site, and the combination of TSN+OPC UA can make the whole process of the factory horizontal or Longitudinal data is interoperable, making the application of the Industry 4.0 scenario even more powerful.
The combination of TSN+OPC UA is still in its infancy in industrial applications, but more and more manufacturers are accelerating their testing and validation to get them into the market faster. Not long ago, at the just-concluded 2018 Hannover Industrial Exhibition, more than 20 manufacturers and organizations jointly launched a test verification for the TSN+OPC UA scenario application.
It is reported that participants include the Business Networking Industry Alliance (AII), the Avnu Alliance, Huawei, National Instruments (NI), and Schneider. Through real intelligent manufacturing scenarios, live demonstrations can accelerate the convergence of IT, OT, CT and DT through the combination of TSN+OPC UA.
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