There are a large number of electronic control devices in the intelligent industrial system under the concept of Industry 4.0. They are all embedded systems, such as industrial robots that we talk about a lot today. The high-performance controller is a very complex embedded system, factory automation. The PLC used in large quantities is also an embedded system. Embedded systems have been mentioned many times in the report “Implementation of the Industry 4.0 Raiders” by the Industry 4.0 Working Group of the German Federal Ministry of Education and Research, as described in the summary section: “Powerful, autonomous microcomputers (embedded) Systems are increasingly interconnected wirelessly with each other or with the Internet. This is causing the physical world to merge with the cyber space in a virtual network-physical physical system (CPS). In the year of launching the new Internet Protocol IPv6, there are already enough addresses to allow objects to be directly interconnected through the Internet."
Embedded systems in smart industrial equipment are very different from consumer electronics. An important indicator is the strict requirements of real-time and reliability of smart industrial equipment. For example, a chemical plant's control system is only caused by time delay. Serious consequences, lighter products will lead to a decline in product quality, defective products will appear, and heavy will lead to life-threatening accidents. Embedded enterprises adapt to the high reliability requirements of intelligent industrial products, and must be prepared for the long development and verification cycle. It is the key to do a good job in embedded industrial products.
In addition, intelligent industrial systems that emphasize interoperability will have a variety of communication needs. In addition to supporting civil communication networks, it also supports industrial communication technologies such as CAN, CAN Open, Modbus Profi Net, Ether CAT, Power link and Ether Net. Under normal circumstances, the smart factory network is deployed in three layers, namely, equipment, control and information, and network security isolation measures are arranged between each layer, as shown in Figure 1. Even so, the information security of intelligent industrial networks can not be ignored. To solve the security problem of intelligent industrial networks, we can start from two aspects: one is the security of the communication link, and the other is the security of the device itself. The realization of these two goals requires the use of embedded chips, software and protocols. At present, the technology and experience of domestic enterprises are far from the foreign countries, and they need to be improved.