Siemens to industrial control network system
In general, corporate communication networks can be divided into three levels: enterprise, workshop and field level. Enterprise-class communications network
Upper management for enterprise networks, providing production, operation and management of data, by way of information
Optimize resources, improve enterprise management level. In this layer communication network, IT technology is very broad
Pan, such as Internet / Intranet, IP technology. Plant-level communication network between the enterprise and between the field level.
Its main task is to solve the need to coordinate the work of the workshop section of the communication between different processes, requiring communication network
High-speed transfer of data to large amounts of information and a few control data, while a strong real-time soldiers. Field-level communication
Network in the industrial network system to the bottom of the scene directly connected devices such as i / o devices, sensors,
Transmitter, frequency and drive and other devices. This layer is the main communication network to pass control signals, real-time network
Requirements and have a high certainty.
As a leading provider of automation systems, Siemens provides a very complete industrial control
SI system of communications programs to ATIC NET, it also follows the three-tier network architecture structure. The overall framework described below
And technical content.
An overall framework for ending the Siemens Industrial Control
Siemens is an industrial control network covering the entire plant-wide communications network, a unified collection of information on the whole plant
And management. It is mainly by the Industrial Ethernet (IEEE 802,3,802.3 u),
Industrial Mobile Communication, PROFIBUS (IEC 61158/EN 50170), AS-i (Actuator-Sensor
Interface), EIB (European Installation Bus) bus, and so constitute a ? "" "2".
(1) AS-i bus
AS-i interface is an open international standard EN50295, the small amount of data for field-level (mainly digital)
Transmission. AS-i specification describes the host and the host communication protocol between the host and peripheral devices as well as with the entire system
The connection system of any As-i module manufacturers have to follow these specifications to ensure compatibility of AS-i products.
(2) EIB bus
European Installation Bus (European Installation Bus, EIB) is a specialized architecture for intelligent
Fieldbus standard area, with distribution, openness, interoperability and flexibility. Compiled by
EIB bus intelligent way to change the function of components, either independently, such as switches, control, monitoring, etc.,
Also according to the requirements of different combinations. Compared with the traditional installation, EIB bus applications enable device functionality
Enhanced, with a high degree of flexibility. It also allows different companies open the base to the EIB protocol developed by the electrical
Equipment can be fully compatible.
(3) PROFIBUS fieldbus
PROFIBUS Fieldbus is an integral part of the international standard IEC61158 Type 111, which defines a serial
Technical characteristics of the fieldbus system. Serial field bus available from the field level to cell level so that the figures can be compiled scattered
A network of process controllers. According to the application characteristics, PROFIBUS is divided into: PROFIBUS-DP, PROFIBUS-FMS
PROFIBUS-PA and three compatible versions. PROFIBUS applies not only to the field of factory automation and process automation
Siemens Industrial Control Network Technology Research and Application of Wood
(Such as chemicals, etc.), but also for traffic engineering, power generation and transmission and distribution and other fields.
(4) Industrial Ethernet PROFIneC
PROFInet is based on the IEEE 802.3 (Ethernet) the strong regional and cell networks, is an international
An important part of the standard IEC61158. PNO (PRoFInet Organization) in August 2001 published PRoFInet
Specification for PROFIBUS vertically integrated, open, coherent and integrated system solutions. PROFInet
The factory automation and enterprise information management organically integrated IT technology, while retaining full
PROFIBUS existing openness. PROFInet special attention on protection of investment requirements to ensure that the existing system
System continues to run, but also requires existing systems can integrate the system has been installed.
2. The technical content of the Siemens Industrial Control Network
Siemens industrial control network technology rich content, generally contains the following sections:
(1) fieldbus technology. For different occasions such as Industrial Ethernet fieldbus, PROFIBUS
AS-I, EIB, constitute the backbone of Siemens industrial control network.
(2) control network extension technology. Control area scale, the need to control network the same or dissimilar
Interconnection between networks, and expand the scope of information transmission. Such as MPI, PROFIBUS network through the repeater can extend their information flee
Length; application of IE / PB coupling module can be realized between Industrial Ethernet and PROFIBUS network connection; DP / PA
DP coupling module can be realized from the transition of the bus to the PA bus, will control the network expansion to a safe explosion-proof areas;
DP / AS-i coupling module to the sensor / actuator bus to exchange data with the DP; DP / EIB module makes building automation
Information passed to the DP bus.
(3) interface technology. Siemens Industrial Control Network is a standardized open control environment, as long as the equipment
Manufacturers or system integrators to follow established standards, you can easily set of third-party device or third-party software
As to the control network. For example, the use of dedicated ASIC chip PROFIBUS communication can be developed in line with PROFIBUS
The bus protocol specification products to meet specific control requirements. Again, as with Microsoft's strong Siemens
Strong joint crystallization of monitoring software to provide C Yan inCC V6.0 script and qisual Basic scripting interface,
OLE and ActiveX interfaces i its soft PLC products corresponding ODK WinAC provides support for C / C + + development interface
And OPC (OLE for Process Contr01) interface. The hardware and software interface, enhanced power control network
Able to complete a variety of control tasks.
(4) control network communication technology
Siemens Industrial Control Network Communication technologies: MPI communication, PROFIBUS communications, Ethernet communications,
AS-i communications, serial communication, PPI communications.
(5) control network diagnostics
Control network diagnostic technology can shorten the installation cycle, the system also plays give enough light to maintain
Important role. Diagnosis by dedicated hardware devices such as BT200, diagnostic repeaters, as well as associated with patient
Off function of the software, such as STEP 7, the relevant function block (FB) can be realized Siemens industrial network diagnostics.
(6) control network redundancy
In the system more stringent reliability requirements of the field, the need for redundant key part of design. To ensure
Barrier system is not asked to run off. Software and hardware redundancy redundancy technology is Siemens two important industrial network
Of redundancy.
(7) control of network security
Internet Internet today there are different levels of security in the hidden thought, such as computer viruses, hackers,
Information security challenges. Similarly, the industrial control network, the message also asked that
Problems, such as from industrial Ethernet connection to LAN or Internet, without encryption while the industrial process data
There may be theft, damage and so on. Once the industrial process data encryption / decryption, the transmission rate will be reduced,
Therefore, security and fast is a contradiction.
(8) Other Network
Other network technologies include: wireless networks, optical networks, and other related technologies.
(Editor：admin) |