Fieldbus is a digital, bidirectional, multi-branch communication network used in production sites to connect intelligent field equipment and automatic measurement and control systems. So what is the specific industrial Ethernet bus, what are the advantages of industrial Ethernet bus? This article will give you a simple introduction.
1. Industrial Ethernet Bus Introduction
Industrial Ethernet buses are generally referred to as technically compatible with commercial Ethernet (i.e. EEE802. 3 standards), but in product design, In the material selection, product strength, applicability and practicability, interoperability, reliability and anti-interference and essential stability and other aspects can be applied in the production site, in the microcomputer measurement control equipment to achieve bidirectional serial multi-node digital communication system.
2. Advantages of Industrial Ethernet Bus
(1) Industrial Ethernet Bus has Good Compatibility and Extensive Technical Support
The industrial Ethernet bus based on TCP/IP is a standard open network, which is suitable for solving the problem of compatibility and interoperation of equipment from different manufacturers in the control system. The industrial Ethernet bus equipment from different manufacturers is easy to interconnect and can realize the seamless integration of information between office automation network and industrial control network. Ethernet is a widely used computer network technology, almost all programming languages support Ethernet application development. Using Ethernet as a Fieldbus can ensure a variety of development tools and development environments for choice. Industrial control networks using Ethernet can avoid its development free from the development of computer network technology outside the mainstream, so that industrial control network and information network technology promote each other.
(2) Industrial Ethernet Buses are Easy to Connect to the Internet
Industrial Ethernet bus supports almost all popular network protocols, can monitor the enterprise from anywhere over the Internet, can easily access remote systems, and share/access multiple databases.
(3) Industrial Ethernet Buses Cost is Low
Because Ethernet is widely used, it is widely supported by hardware developers and manufacturers. It has abundant hardware and software resources and a variety of hardware products for users to choose from, and the hardware price is relatively low. Ethernet network cards are currently only a tenth of the cost of Fieldbus, and with the development of integrated circuit technology, the price will be further reduced. Many software resources and design experience can significantly reduce the development and training costs of the system, in the industrial Ethernet bus technology upgrade without a separate research investment, thus can significantly reduce the overall cost of the system, and greatly speed up the development and promotion of the system.
In short, the industrial Ethernet bus has the advantage of the high-cost performance, which can help enterprises better carry out industrial production, which is why the industrial Ethernet bus can be widely used.
3. What are the Industrial Ethernet Protocols
Industrial Ethernet is the extension of the application of standard Ethernet in the industrial field, and with the advancement and implementation of intelligent equipment, enterprises have a very urgent application demand to build a unified industrial communication network.
(1) MODBUS TCP/IP
Schneider Electric's strategy is to develop collaborative automation solutions based on industrial Ethernet. MODBUS systems can be easily upgraded to MODBUS TCP/IP. Users do not need to reinvest in the original system. It is easy to update or upgrade from an existing MODBUS system to MODBUS TCP/IP using MODBUS serial connections. If you are using another network, you can also apply the corresponding gateway to integrate or upgrade it to an Ethernet system.
(2) Ethernet/IP
Ethernet/IP is an industrial application layer protocol for industrial automation applications. It is an Ethernet industrial protocol created by Rockwell Automation Company which mainly promotes ControlNet Fieldbus for Ethernet to enter the field of automation. It is based on standard UDP/IP and TCP/IP protocols, using fixed Ethernet hardware and software, defines an application layer protocol for configuring and controlling industrial automation equipment.
(3) Ethernet POWERLINK
Ethernet POWERLINK is a real-time data transmission technology based on standard Ethernet media in industrial control and data acquisition. Ethernet POWERLINK has Ethernet's high-speed interface and CANopen's industrial SDO and PDO data definition. In a sense, POWERLINK is the CANopen of Ethernet. The physical layer and data link layer use Ethernet medium, while the application layer retains the original structure of SDO and PDO object dictionary.
(4) PROFInet
PROFINET is a new generation automation bus standard based on industrial Ethernet technology. PROFINET covers current hot topics in automation such as real-time Ethernet, motion control, distributed automation, fail-safe, and network stability, and is fully compatible with industrial Ethernet and existing Fieldbus technologies such as PROFIBUS as a cross-vendor technology.
(5) SERCOSIII
Sercos (Serial Real Time Communication System) has been applied to factory automation (suitable for mechanical engineering and construction) is popular for 25 years. SercosIII provides an efficient and deterministic communication protocol that blends real-time data exchange over the Sercos interface with Ethernet. SercosIII is a combination of Sercos 'mature communication mechanism and industrial Ethernet. It has the real-time characteristics of Sercos and the characteristics of Ethernet.
(6)EtherCAT
EtherCAT sets a new standard for real-time performance and topology flexibility while meeting or even reducing the cost of Fieldbus use. EtherCAT also features high precision device synchronization, optional cable redundancy, and functional Stabilization protocol (SIL3).
