Organic Combination of Industrial Ethernet and Fieldbus

The introduction of Ethernet will provide the possibility for the follow-up development of the control system. And users do not need to invest in the technology upgrade alone. For this point, any existing fieldbus technology is incomparable. At the same time, the development of robot technology and intelligent technology requires that the communication network has higher bandwidth and performance control engineering network copyright, and the communication protocol has higher flexibility, which can be well met by Ethernet.

Although industrial Ethernet has really realized the whole network in some industries, but for other industries, fieldbus and industrial Ethernet will coexist for many years. Fieldbus and industrial Ethernet are two technologies commonly used in industrial control applications. Although many kinds of fieldbus technologies are incompatible with each other, the controllers of different companies can not achieve high-speed real-time data transmission and the "automation island" caused by the protocol gap in the information network. However, in the control network, the rapid recovery of network faults and essential security are still the main obstacles to the comprehensive application of Ethernet. Therefore, generally speaking, field bus technology is still widely used in the device layer, while the application of industrial Ethernet is mainly concentrated between the manufacturing execution layer and the device layer. This not only reduces the investment risk of users, but also protects the existing equipment and technology investment of users. It can be expected that the mixed state of fieldbus and industrial Ethernet will last for quite a long time. However, it is certain that Ethernet has become an irreversible "presence" in the industrial field. From the current international and domestic development of industrial Ethernet technology, industrial Ethernet has been widely used in the manufacturing execution layer, and has become a fact standard. In the future, industrial Ethernet will play a more and more important role in the interconnection and information integration of field devices in the integrated automation system of industrial enterprises.

The popularization and application of fieldbus technology is affected to a great extent because it is difficult to form a unified standard. In addition, a single fieldbus is obviously unable to complete the complex information management function CONTROL ENGINEERING China copyright, which makes its integration with the information network very natural. Traditional commercial Ethernet is the most widely used communication technology, which has many advantages. However, Ethernet is regarded as a kind of "non-deterministic" network, which can not meet the real-time requirements and the harsh environment requirements of the industrial field. With the development of industrial Ethernet, the problems of communication certainty and real-time, stability and reliability, security and bus power supply are being solved in industrial Ethernet. It is generally believed that industrial Ethernet is the best solution for the future control network and has a broad development prospect. But at present, industrial Ethernet has to use special industrial Ethernet switches, communication modules and other expensive equipment, which affects the promotion and application of industrial Ethernet to a certain extent. Therefore, the mixing of fieldbus and industrial Ethernet as the subnet of Ethernet and the state of Ethernet as the superior network of fieldbus is a more realistic solution at present. And it will last for quite a long time.