Industrial Ethernet needs to solve two problems - Database & Sql Blog Articles

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Industrial Ethernet currently needs to address two issues:

1) Connector: This does not refer to software, but to hardware. Hardware connector, by the crystal head is not good, a relatively fragile, easy to disconnect, two volumes are too large, not suitable for a large number of integration;

2) The cost of the chip is high: it is not EPA, or the ordinary Ethernet chip is too expensive. When the price is only reduced to 2 RMB, it has sufficient advantages, and the speed is fast. 100M is necessary, otherwise it will affect the entire network exchange. speed;

With these two advantages, instead of the current fieldbus, it is feasible in a short time.

Two years ago, I saw that the United States developed a high-speed Ethernet chip of less than one US dollar. At that time, I felt magical. Now, look at it, there is no following. It seems that we still need to work hard. I am looking forward to Industrial Ethernet.

First, there is currently no unified industrial Ethernet hardware standard. There is no uniform standard for industrial Ethernet cables and connectors. Secondly, there is a lack of a unified industrial control application layer protocol. Since the Ethernet specification only defines the physical layer and the data link layer, the network layer and transport layer protocols on it are mainly based on the TCP/IP protocol. In the application layer protocol of the user application interface, the characteristics of the data structure and the like do not adapt to the real-time communication of the industrial control. Therefore, there must be a uniform application layer specification. Again, real-time control issues. Although the development of Ethernet has made an essential leap forward, high-speed (100M) and Gigabit Ethernet have been produced, and technologies such as switches and full-duplex, information priority are widely used to avoid conflicts and collisions, and to improve fault-tolerant technology. However, in the application process, it is required to carefully control and calculate the load of the system, which should be controlled below 25% to ensure the reliability of the system.

In addition, in addition to the technical problems mentioned above, it is more realistic to develop or improve the underlying intelligent instrumentation, which must support the Ethernet interface and the TCP/IP protocol. The application of Ethernet at the bottom of the factory relies on the emergence of a large number of underlying smart meters that support the Ethernet interface and the TCP/IP protocol. At present, the traditional instruments and meters of domestic enterprises account for the vast majority, and the popularity of digital and intelligent instruments still has to wait. This is one of the reasons why the current Ethernet technology is unstable.