Keywords: Century Star configuration software; dust collector; configuration design
1 Introduction With the continuous deepening and development of China’s reform and opening up process, the air problem has become a key issue that people are eagerly concerned about. With the continuous deterioration of air quality, continuous pollution of the water environment, and continuous destruction of the ecological environment, the air pollution has caused the environment to be contaminated. It is increasingly threatening human survival and development. 70% of China’s energy comes from burning coal. Particles, nitrogen oxides, and sulfur dioxide released during the combustion of coal constitute the primary pollutant that pollutes the atmosphere. In order to improve the quality of the atmospheric environment, exhaust gas dust removal from boilers, thermal power plants, cement plants, chemical plants, industrial kilns, and waste incineration facilities has become a national mandatory requirement. On the other hand, in the modern large-scale enterprises, in order to centralize management of various production processes and improve production efficiency, the configuration control system of the host computer was gradually adopted. The upper computer control not only overcomes the disadvantages of the analog instrument being too dispersed, inconvenient for monitoring and operation, but also can realize data networking and send the data to the ERP and other management systems.
The SCADA system based on computer based on the 2nd Century Star Configuration Software has developed rapidly in recent years. The Century Star Configuration Software is a solution to the production and process automation, visual information, display and implementation control strategy of Beijing Century Changqiu Technology Co., Ltd. in the WINDOWS environment. That is, the configuration software for the HMI-Human Machine Interface (SCADA) is implemented. It provides a variety of functions suitable for industrial graphics display, alarm, data recording, and reporting. It can achieve high-performance process coupling, fast image update, and reliable data processing with high practicality. It provides all the features needed to ensure reliable control of the production process in the Windows environment.
Centurystar configuration software has a rich software interface, it is easy to establish a human-machine interface in conjunction with standard or user programs to accurately meet the actual production requirements. Users can apply Century Star as their basis for system expansion and develop their own application software through an open interface. Centurystar is based on 32-bit application software. The multitasking features of the Windows 32-bit operating system ensure a rapid response to process events and provide multiple protection against data loss. Centurystar Configuration Software uses object-oriented software programming techniques to integrate the configuration functions of all engineering tools and provide all basic functions for process visualization and operation. In addition, a wide range of editing functions and interfaces are provided, allowing users to individually configure their unique applications.
3 Configuration software design of the dust removal system 3.1 Establishing the device driver The device driver is the link between the configuration software and hardware devices. The configuration software communicates with the lower hardware device by calling the drive device. The hardware device needs to pay attention to: hardware address, serial port devices need to set the serial port parameters include: baud rate, data bits, stop bits, check the form. For an Ethernet device to set an IP address, the port number of the device port number must also be set.
3.2 Creating variable database The variable database is the core part of configuration control. The working status of the dust collector on the scene must be reflected on the screen in the form of animation. At the same time, the instructions issued by the operator before the computer must also be quickly delivered to the scene. All of this is based on the real-time data of variables. Create a variable database, that is, define the I/O variables inside the configuration software, and define attributes for each variable, such as temperature, pressure, and so on.
The variables defined in the configuration software system are very different from those defined in the general programming language. They are mainly divided into internal variables and IO variables and system variables and special variables. Internal variables are similar to variables in the general language. The system variable is a variable that comes with the software system. Do not create it yourself. It represents some system functions, such as: time, date, and user login. The special variables in the Centurystar configuration software are only alarm variables and historical trend curve variables. The IO variable is a variable that is connected with the device, that is, reacting to external data such as temperature, pressure, and start-stop control of the motor.
The establishment of variables includes whether to select variables for alarms and alarm parameters, whether data recording and data recording parameters are required, etc. If it is an IO variable, it is also necessary to select the driver to be built and the corresponding register.
3.3 Production Screen The production of the graphic screen is to use the graphics library provided in the configuration software system to simulate the actual dust collector system and combine its graphics, colors, and display data to form an intuitive and visually acceptable graphic. Generally, it is best to make the graphic close to the actual equipment on site, and the operator can easily find the data of the device to be viewed. Graphical production should also try to maintain the usual habits, such as: green indicates running, red indicates stopping and so on.
3.4 Connection variables Connection variables connect variables to the screen. Centurystar configuration software provides data display, color conversion, dynamic filling, position shifting, size change, implicit visibility, flow effects and other connections. Combining these animation links will produce rich graphical animation effects on the screen. For example: We connect the variable "fan status" to the indicator. When the variable "fan status" is 1, the setting display color is green. When the variable "fan status" is 0, the display color is red, so that it can be on the screen. We can know the operation of the fan through the change of color.
4 System use effect The use of Century Star configuration software configuration control of the host computer makes the dust collector system's automation level greatly improved. Has the following advantages:
1) Automatic collection of real-time data, automatic over-limit alarm, permanent record of data, and query of all production data recorded at any time.
2) Optimize control of on-site operations, improve working conditions, reduce failures, and improve maintainability.
3) Realize network data transmission. The data can be transmitted to the upper information system through the network and provide data reference for formulating production plans.
4) Achieve the daily report function, automatically print, and get rid of the situation of manually filling out the report.
5 Concluding remarks Using Centurystar configuration software as the monitoring and data management center of the dust collector, powerful graphic display functions and rapid hardware data collection capabilities greatly facilitate the operator, reducing the labor intensity of the operator and improving the labor environment. , And improve the process safety performance, and can change the process in time, increase production efficiency, reduce losses, improve equipment maintenance.