|
Abstract: This paper describes the use of PROFIBUS Fieldbus Technology to build enterprise control networks, data acquisition and remote monitoring; and the use of OPC technology bus control network interfaces and seamless connection management information network to improve the automation of the enterprise management level. Keywords: PROFIBUS bus, OPC specifications, control network, integrated automation, control system 0, Introduction Fieldbus technology is the 90s of the 20th century as a rapidly developing field automation equipment for a variety of control systems with network communication technology, is used in various Field Instruments (Including transmitters, actuators, recorders, single-loop controller, PLC, process analyzers, etc.) and computer-based control systems for data communications systems. PROFIBUS field bus is used for a certain number of regional and unit level equipment, networking with international standards, mainly for factory automation equipment shop floor level monitoring and on-site data communication and control. Field equipment can be realized to the shop floor level monitoring of distributed digital control and field communications network for the realization of integrated factory automation and intelligent field devices provide a viable solution. Integrated automation is the development direction of modern industrial automation, in the framework of a complete enterprise network, field bus control network model should be involved in the network of field devices from the bottom to the top of the information network data transmission. Network is the basis of integrated automation company in the entire enterprise network architecture, foundation fieldbus is, establishment of a complete fieldbus control network model is of great significance. This model extends to the highest level of control in the field, that is management decision-making, thus requiring close control network and information network, which guarantees the device from the bottom to the top spot among production management, the correct data transfer and data forwarding. OPC specification for OLE / DCOM as the technical basis, and OLE / DCOM support the TCP / IP and other network protocols, it can be physically separated from the various subsystems, distributed in different nodes of the network. OPC standard to ensure the automation systems and commercial systems can share information and through the factory to operate with each other, so you can use OPC to control the network interface technology and management information network for seamless connectivity. 1, system requirements and tasks Keeping with international standards, the enterprise's information technology modernization requirements. To be built in a soda plant in Guangdong perfect enterprise management, production process monitoring of information network system, the use of advanced networking technology to build a suitable modern office and industrial process control network system, at the same time, it connected with the WAN to achieve full sharing of information and information sent security mechanism. The system will plant six workshops nearly 856 temperature, pressure and liquid level alarm points such as test points and are confined to the central control room monitoring, field equipment and real-time data posted to its website, the user can navigate in the browser Access to realize the kinds of information and data sharing. Demands a high real-time control network, reliability, data integrity and availability, the control sub-stations can be achieved on the field level of industrial equipment for safe and reliable monitoring and control, and has friendly and beautiful HMI That can dynamically display process, and parameter settings is simple, historical, real-time trend curves inquiries, alarm and report auto printing. 2, system design Data acquisition and remote monitoring system is to use S7-300 series of CPU315-2DP PLC and PROFIBUS-DP communication module, expansion I / O modules connected via PROFIBUS fieldbus form. The control sub-station data collection, monitoring system cabling to the main truss structure PROFIBUS-DP, in six different workshops under the input, using 14 S-300's PLC And I / O expansion modules industrial site Sensor ; Control sub-station to PLC Real-time data collected using PROFIBUS field bus to the main control room of the main test computer display. Combined with resource information sharing requirements, using PROFIBUS bus and INTERNET technology into sound business management, production process monitoring of information network system, control the network and tightly integrated information network. Control network through real-time database and OPC interfaces and information technology network interconnection, the establishment of enterprise integrated real-time information database, the optimal control for the enterprise, provide the basis for scheduling decisions. A soda plant in Guangdong and remote monitoring data acquisition system consists of distributed I / O data acquisition, the main station monitoring, remote monitoring, the company LAN, process control, network cabling and other subsystems. System structure and configuration is as follows: Figure 1. System block diagram 2.1 data acquisition and monitoring system According to a Guangdong Soda data acquisition and remote monitoring system characteristics, the Siemens Totally Integrated Automation product composition. With S7-300 series of CPU315-2DP and PROFIBUS-DP communication module, expansion I / O modules SIMATICET200M other form data acquisition system, through integration of PROFIBUS bus; by every consideration, the program has high performance and low cost. In the traditional factory automation, input / output device connected to a centralized rack, changes in equipment and system expansion, leading to large amount of wiring work, high cost and low flexibility; system application SIMATICET200 Distributed I / O by opening and standardized fieldbus system to connect components is the best solution to solve these problems. Control Sub-station man-machine interface with fully integrated PROTOOL Siemens configuration software, developed friendly and beautiful interface, to dynamically display process, and its parameter settings is simple, historical, real-time trend curves inquiries, alarm and automatically print reports functions; field-level devices from the PLC implementation of centralized control and adaptive, fuzzy, so intelligent PID control algorithm programmed to control the safe and reliable, to achieve optimal control of unit-level equipment can meet the control requirements of various field devices. Figure 2. Scene PROTOOL HMI 2.2 central real-time monitoring layer (dispatch center) Main control room monitoring software using WINCC as the host, WINCC is in production and process automation to solve the task of visualization and control of the neutral system. The software is simple to use and easy configuration, reliable performance, complete function; it has a large number of communication interfaces, and a variety of intelligent devices can communicate with each other. Based on Siemens all The e-commerce company in China offers quality products such as Roller Cabinet , Tool Chest, and more. For more , please visit Roller Cabinet today!
Related Articles -
Roller Cabinet, Tool Chest,
|
