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OPC UA is a vendor-independent communication protocol designed for industrial use. TSN (time-sensitive network) is a further development of the IEEE Ethernet standards. Together, they aim to offer the first truly vendor-independent real-time, deterministic Ethernet communication standard. As the technologies receive increasing media attention, experts in the automation arena are asking: Will OPC UA TSN supersede existing industrial Ethernet networks?
A New and Better Industrial Ethernet? The Market Will Decide
It's widely believed that the market will decide whether OPC UA TSN will replace existing industrial Ethernet fieldbuses. But this raises the question: Who are the market participants and why would they switch from industrial Ethernet to OPC UA TSN?
In automation, there are three types of market participants: 1) suppliers of automation and drives equipment, 2) machine builders for factory automation and equipment suppliers for the process industries, and 3) end users. The automation suppliers that developed today’s variety of industrial Ethernet fieldbuses began their developments by seeking to implement a standard protocol. But when it came to time-critical applications like high-speed motion control using servo drives, they developed the solution beyond standard Ethernet and often made hardware modifications to automation and drive devices to achieve the required reliability and robust, real-time performance.
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Keywords: OPC UA TSN, Industrial Ethernet, DDS, Digitization, Profinet, EtherNet/IP, SERCOS, Powerlink, EtherCAT, CC-Link IE, ARC Advisory Group.