Abstract The design of smoke electrical control system is an important part of the development of smoke machine products. The smoke machine manufacturers purchased the E-CAE software EPLAN 21 and put it into use. This article combines the work practice, introduced the characteristic of E-CAE software EPLAN 21 at first, then introduced the application of this software in the design of smoke electrical control system.
Keywords E-CAE software EPLAN 21 smoke electrical control system design
I. Introduction
The electrical control system is the brain and central nervous system of advanced and complex mechanical equipment. It relates the communication of various parts of the machine, provides the power of the machine, measurement and control of various components, and contains a large number of components, power lines, and signals. Lines, control cables, etc., their design is closely related to machine performance and quality. In the design process of the electrical control system, designers need to comprehensively analyze and process various types of electrical information, mechanical information, material information, standardized information, and management information related to the system. The design of the traditional tobacco equipment electronic control system needs to complete the following tasks:
1. Make an overall control plan according to the process characteristics of the equipment and draw a schematic diagram of the control flow.
2, according to the control process, according to the relevant design standards and design principles of key components (such as PLC, IPC, HMI, drive devices, sensors and the main implementation of the device) selection. Write purchase materials and apply for material codes for new components that are not coded.
3. According to the control flow and the selection of the main control device, draw the corresponding control sketch, and perform statistics on the input/output points and make the I/O allocation table.
4, writing applications.
5. According to the design standards of drawings, perfect the schematic design and device selection, and write the purchase materials and the application of the material code for the new components without coding.
6. Manually count the devices used to complete the device component table.
7. According to the design of the mechanical parts, draw the position map, layout drawing and electrical process design data (such as wiring diagram or wiring table).
8, according to the equipment component table and other technical information to complete the preparation of the electrical BOM table, and import the company's PDM system.
9. Manually count electrical patterns and complete the preparation of the electrical pattern file directory.
With the development of automation and information technology, all domestic cigarette makers have deployed their own CAD/CAE/CAM/PDM/OA platforms to improve their core competitiveness. Under normal circumstances, the company's configured CAD software is a mechanical design platform such as AUTOCAD, PRO/E, SOLIDWORKS, etc. These softwares increase the design speed for mechanical design, reduce duplication of labor, and shorten the design and development cycle. However, due to the differences in electrical design and process and machinery, these softwares do not reduce the labor intensity of electrical design engineers and improve design efficiency. Therefore, electrical design engineers have always been too cumbersome for design data, have too many redundant work, low design efficiency, and errors are difficult to avoid. Troubled.
The E-CAE software EPLAN21 developed by EPLAN in Germany solves the problems that plague electrical engineers. It provides a complete solution for every electrical engineering project. With an open, modular system and extensive feature selection to give them a high degree of flexibility, EPLAN21 not only improves the efficiency of the electrical control system design, but also provides the most suitable support at each stage of the project design.
Second, the technical characteristics of EPLAN21
According to our experience, the technical features of EPLAN21 are summarized as follows:
1. Powerful Project Drawing Management Function
Traditional AUTCAD software must be named one by one. Designers cannot understand the relevance of naming and drawing. If you need to modify or add drawings, you must spend more time modifying the front and rear numbers or rearranging them. EPLAN 21 uses a WORKING SET to manage the drawing (Figure 1). Each project can hold 32,000 images. The drawing number can be easily adjusted for any drawing, and any content in the frame can be easily modified. It does not have to be like AUTOCAD software. Repeatedly modify the content of the drawings. When printing data, you can select some or all pages to print without having to make tedious settings.
figure 1
2, the standard electrical symbol library
The drawing of electrical drawings is the most difficult to standardize. The drawing details of the electrical drawings of most of the company's drawing software are not standardized, and the electrical symbols are all assembled by the designer according to his own experience or the company's previous habits. . For example, AUTOCAD provides only a drawing environment. It is an open architecture and cannot control every designer's guidelines. The size, position, and number of graphics drawn by different designers cannot be unified. EPLAN 21 provides a standard electrical symbol library and component number (Figure 2). Designers can easily establish standards, unify all electrical drawings, and create a database on many drawing and data preparation details to form the company's own standard.
figure 2
3, accurate and flexible device library
Linking EPLAN 21's device library with the company's database through ODBC (Figure 3) makes the basis for device design selection and data from the company's production data management system (PDM) come from the same database, which reduces intermediate links and improves Work efficiency, but also improve the design accuracy.
image 3
4, powerful electrical data and chart automatic generation function
AUTOCAD provides electrical designers with a 100% drawing environment. Any electrical drawings, data, and charts are drawn by the designer. With EPLAN 21, the designer draws only 30% of the circuit diagrams, and the remaining 70% of the data and charts are automatically generated by EPLAN 21, such as the list of electrical drawings, equipment components, wiring diagrams, wiring tables, and connector maps. Terminal block diagrams, bill of materials (BOM), and more. The resulting bill of materials (BOM) data can be linked directly to the company's database via ODBC, making it a production data source (Figure 4).
Figure 4
5, convenient and fast PLC I/O design function
The application of programmable controllers (PLCs) in control loops is quite common nowadays. EPLAN 21 provides PLC screens for many world-renowned manufacturers (eg SIEMENS, AB, GE, HITACHI, etc.). With the necessary text information, the PLC I/O design can be completed in the shortest possible time. At the same time, the designer can also supplement the PLC screens of other companies commonly used by the company to form the company's own PLC database.
Figure 5
6, rich graphics input and output interfaces
EPLAN 21 drawings (Figure 6) can be output in various file formats such as DXF, DWG, and PDF, and can be edited by reading drawings in DXF, DWG, and other formats.
Figure 6
7, automatic translation function
EPLAN 21 supports 16 major languages. Through the designer's customization, the text information of the designed drawings, data, and charts can be automatically switched among multiple languages ​​(Figure 7). For companies with international markets, it is very beneficial to apply this function.
Figure 7
Third, based on E-CAE software EPLAN21 smoke electrical control system design examples
Below the author of the YF14 cigarette storage delivery system electronic control system design examples, describes the use of EPLAN21 design process and methods.
1. Create a new working set named YF14.
2. Create a new project YF14.
In this step, a template must first be selected. The template can be various standard templates (IEC, DIN, JIC, etc.), or it can be a custom template of the enterprise. According to actual requirements, the author defined a template ctmtc (abbreviation of China Tobacco Mechanical Technology Center). In the template, the format of a symbol file, a plot frame, and various automatically generated files or patterns is defined. Corresponding to the above symbol file, plot frame and form, there are various standard formats for users to choose from in EPLAN 21. Under normal circumstances, enterprises form their own symbol file, plot frame and form according to their own requirements, so as to form a satisfied Business requirements template.
3. Define the project's attributes to match the project's actual situation (Figure 8).
4. The selected device is exported from the company's material library in EXCEL file format and associated with the device library of EPLAN 21 software via ODBC (Figure 9).
Figure 9
5. The PLC I/O allocation table is compiled in EXCEL's .csv format and stored in the PLC database.
6. Draw the electrical schematic (Figure 10).
Figure 10
The electrical schematic should reflect the electrical, geometrical, material, and standardized information of all devices. Since geometric information and standardized information in EPLAN 21 software have been customized or automatically generated, the connection characteristics can also be automatically formed in electrical information. Therefore, only part of the electrical information needs to be explained and the material information can be selected.
In EPLAN 21 software, each device (including wiring) has its own attribute table and consists of the following five parts:
(1) DEVICE TAG: mainly reflects the device's text symbol information, which is generally customized in the template, and can be modified as needed.
(2) PROPERTIES: Position information, connection characteristics, description, and electrical information of the device.
(3) INSTANCE: Display information, specify the PROPERTIES to be displayed, and display location and format.
(4) SYMBOL DATA: Graphical symbol information for the device.
(5) PART: The material information of the device is selected in the previously associated material library.
7. According to the mechanical installation position, draw electrical location maps and layout drawings (Figure 11).
Figure 11
8. Select the appropriate FORM to automatically generate electrical process drawings and documents (including wiring diagrams or wiring lists, connectors, and terminal block lists, etc., see Figure 12).
Figure 12
9. Select the appropriate FORM to automatically generate the electrical equipment component list (Figure 13).
Figure 13
10. Automatically generate a drawing file directory (Figure 14).
Figure 14
11. Automatically generate the BOM table in EXCEL file format, and then integrate with other mechanical information to form a complete BOM table of the electrical control system and then import the enterprise's PDM system.
Fourth, the conclusion
EPLAN 21 software is a professional E-CAE design platform developed based on the WINDOWS operating system, emphasizing an overall structure of the electrical control system design, constructing the electrical information, geometric information, material information, standardized information and management information of the system into one Standard framework for flexible user selection and customization. Its design interface is friendly and operability is strong. The electrical engineer only needs to input the necessary real design information, and submits a large amount of cumbersome statistics and mechanical repetitive work to the computer, which greatly improves the design efficiency and the design changes. Especially simple and convenient. EPLAN 21 software has strong interface compatibility. Its graphic interface can be compatible with GUI and AUTOCAD. The data interface can be easily integrated with the enterprise's PDM system through ODBC, ensuring the consistency of design data.
China's hood manufacturing enterprise in the information era adopts E-CAE electrical professional design software EPLAN 21, which is conducive to improving the standard and accuracy of electrical design, helping to improve the development speed and development quality of the enterprise and improving the competitiveness of enterprises. Power is conducive to international integration.