The foundation of intelligent manufacturing is the interconnection of industrial information, and industrial intelligent gateways play an important role in industrial interconnection. A technical solution for an industrial smart gateway is given: taking TI’s industrial-grade Sitara processor and embedded Linux operating system as the core, and completing the analysis of various industrial protocols through the co-processor on the Sitara chip; using OPC UA unified architecture , as a unified interface for information exchange between OT and IT; by cutting and modifying the MySQL source code, using MySQL as the edge embedded storage database of the intelligent gateway; by streamlining and compiling the PHP source code and operating environment, developing PHP-based software in the embedded environment Web management software. Engineering practice has proven that this solution is simple and easy to implement and has broad application prospects.
Whether it is the Industry 4.0 plan [1-2) or the Made in China 2025 plan 3), the core is to achieve intelligent manufacturing. An important foundation of intelligent manufacturing is the interconnection of information between existing intelligent devices, which gave birth to the industrial Internet. Due to different countries and regions and different industrial equipment manufacturers working independently, the current industrial communication protocols are complicated, which increases the difficulty of interconnection between industrial equipment and systems. The industrial intelligent gateway, at the edge of the industrial control site, completes the interconnection, information collection, storage and calculation analysis of field-level, workshop-level and enterprise-level equipment and systems in intelligent manufacturing, and plays a very important role in intelligent manufacturing.
OPC UA41 is a set of data exchange standards that are safe, reliable, manufacturer- and platform-independent, and used for industrial communications. It is vigorously promoted by the OPC Foundation. OPCUA is a specification jointly formulated by manufacturers, end users, scientific research institutions and industry associations to achieve secure information exchange in different systems. This specification enables data exchange in a standard format between devices from different operating systems and manufacturers.
In 2018, TI launched the Sitara series ARM processor 5 for industrial interconnection. Through the communication protocol processor PRU-ICSS carried on the chip, it can complete the interconnection with industrial communication equipment of various manufacturers by replacing different industrial communication protocol software versions. Interoperability is an ideal choice for industrial smart gateways. At the same time, the Swedish HMS company’s Anybus[6] industrial interconnection SOC solution NP40, which has been commercialized, is also an ideal choice, but it requires the addition of a main control CPU to the periphery.
Currently, most of the mature industrial intelligent gateways on the market are foreign companies, represented by HMS Softing. Foreign companies have mature technologies, but the cost is high. A few domestic companies also have similar products, but their functions are not very complete. Therefore, ,The industrial intelligent gateway technology solution provided in ,this article has important reference value.
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