The rapid advancement of Ethernet and communication technologies has led to the further development of Industrial Ethernet technology. At present, it has been widely used in the resource management layer and executive manufacturing layer of the integrated automation system of industrial enterprises, and has a downward trend extending directly to the industrial control site. From the current development of international and domestic industrial Ethernet technologies, industrial Ethernet has been widely used in the manufacturing execution layer and has become the de facto standard. Future Industrial Ethernet will play an increasingly important role in the interconnection and information integration between field devices in industrial enterprise integrated automation systems. In general, the development trend of industrial Ethernet technology will be reflected in the following aspects:
(1) Combination of industrial Ethernet and fieldbus
The research of industrial Ethernet technology has only attracted the attention of industrial control experts at home and abroad in recent years. After more than ten years of development, the field bus has become more mature in technology, and has begun to be fully promoted in the market, and has formed a certain market. At present, there are still some problems in the complete replacement of the field bus. It is necessary to further study the new control system architecture based on Industrial Ethernet and develop a series of products based on Industrial Ethernet.
(2) The direct application of industrial Ethernet technology to communication between industrial field devices has become a trend
With the increase of Ethernet communication rate, the development of full-duplex communication and switching technology, it provides a technical basis for the deterministic solution of Ethernet communication, thus eliminating the main obstacles for Ethernet to be directly used for communication between industrial field devices. It provides technical possibilities for Ethernet to be directly used for communication between industrial field devices. To this end, the International Electrotechnical Commission IEC is working on the drafting of Real-time Ethernet (RTE) standards to promote the full application of Ethernet technology in industrial control.
(3) Web-based network monitoring platform
Embedded Ethernet is a hotspot of recent network applications, that is, all devices connected to the network are interoperable through the Internet, from computers, PDAs, communication devices to instrumentation, household appliances, and the like. Within the enterprise, the enterprise information network can be used to publish and display the real-time running data of the factory. The administrator can perform real-time remote monitoring, remote device debugging and remote device fault diagnosis and processing on-site working conditions through a web browser. The easiest way to achieve this is to use a separate Ethernet controller to connect to a control host with a TCP/IP interface and a field device with an RS-232 or RS-485 interface. The Ethernet controller plays a bridge between the general computer network and the various devices on site.
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