Abstract: This paper introduces the basic process of developing monitoring software using industrial control configuration software and its application in a high-voltage frequency converter monitoring system. This system features a user-friendly interface, ease of operation, reliable operation, and convenient upgrade and expansion. Keywords: Configuration software; High-voltage frequency converter ; Monitoring system 1 Introduction With the continuous advancement of microcomputer technology and automatic control technology, computer-aided automatic detection and control technology has been introduced into many fields. Furthermore, with the deepening and development of research in various fields, the requirements for computer-aided automatic measurement and control systems are becoming increasingly stringent. Industrial control configuration software is a new type of software development technology that has emerged in the field of industrial automation in recent years. Developers typically do not need to write overly complex program code; they can complete the development of the required application software simply by using the tools in the configuration software package to perform data configuration, graphic image configuration, etc. It has advantages such as easy secondary development, short development cycle, strong versatility, and high reliability. In recent years, China's industry has developed rapidly, and the corresponding industrial control field is also developing towards scientific and modern directions, such as the requirements for controlling various high-voltage frequency converter equipment operating on-site. Since high-voltage frequency converters are almost all key equipment in industrial and mining enterprises, the high requirements for their reliability are self-evident. Therefore, it is particularly important to monitor the real-time data, operating status, fault status and operating parameters of high-voltage frequency converters in real time and make corresponding controls according to the specific situation. In order to achieve this goal, we designed and completed the development of frequency converter monitoring system using the industrial control configuration software MCGS as the development platform. 2 Requirements for frequency converter monitoring system 2.1 Technical requirements for monitoring system (1) The monitoring system is required to ensure the real-time accuracy and reliability of various monitoring data, reduce the influence of human factors, and provide reliable field data support. (2) Good maintainability, so as to facilitate the normal operation of the system. (3) Provide a user-friendly human-machine interface to facilitate the operation of field personnel. (4) Provide data processing and historical data management functions for real-time data. (5) Provide flexible interfaces to provide users with good secondary development functions and information integration with other management information systems. 2.2 Specific requirements for monitoring system (1) Signal acquisition and data processing: Convert non-standard signal data from the field into standard signals through configuration software. (2) Status display: The status of the frequency converter, such as start, stop, ready, closed, connected, running, bypass, alarm, and external control, is dynamically displayed on the monitoring screen through configuration software, which has a real-time and dynamic effect. (3) Monitoring operation: Automatic real-time monitoring of frequency, temperature, current, voltage, wind pressure, etc. (4) Operation screen: Real-time and historical data of voltage, current, power, temperature, etc. of the device can be queried on the operation screen. Real-time and historical curves and equipment status can also be queried, and real-time reports and historical reports can be set and printed as required. 3 Hardware composition of frequency converter monitoring system The frequency converter monitoring system mainly consists of an industrial control computer, a printer, and a frequency converter control cabinet (mainly including PLC, analog input/output modules, digital input/output modules, fiber optic trigger modules, UPS power supply and some communication cables, etc.), and its screen is shown in Figure 1. The industrial control computer (ICC) acts as the monitoring center, transmitting all the inverter's operating data and parameters via serial communication (RS-485) through shielded twisted-pair cables to the ICC for real-time display on the human-machine interface (HMI). The ICC can also issue commands to control the inverter's start, stop, and reset. This completes the acquisition and transmission of all data and commands. Simultaneously, it can perform management-level functions, such as local area network management tasks, generating records, reports, and statistical reports required by management departments. [align=center] Figure 1 Schematic diagram of the inverter monitoring system[/align] 4 Monitoring System Software Configuration The software configuration section completes the interaction interface between the monitoring system and the operators, serving as the core for monitoring, controlling, scheduling, and managing the entire system. The HMI is divided into two parts: a main interface for daily monitoring and system parameter settings, and a sub-interface for indicating and managing non-daily monitoring information, such as various reports, curves and trend charts, and historical records. After the configuration software runs, clicking the company information image will take you to the main interface of the inverter system monitoring. At the top of the main interface is a row of indicator lights to indicate the status of the frequency converter system. In the lower left corner is an alarm description status bar to display all current alarm information of the frequency converter. The data display bar on the right displays real-time data such as frequency, stator voltage, stator current, and pressure. At the bottom of the main screen are four buttons for displaying other functions of the software system: system parameter settings, real-time curve display, historical data list, and alarm record viewing. Pressing the corresponding button will take you to the corresponding screen, as shown in Figure 2. [align=center] Figure 2 Monitoring Main Screen[/align] 4.1 Parameter Setting Function After pressing the parameter setting button, a user login dialog box will pop up. Only by entering the correct password can you access this screen for settings, effectively preventing accidental operation by non-professionals. This screen is mainly used to set all parameters of the frequency converter. Operators can press the "Parameter Table" button to view the specific usage descriptions of the corresponding parameters. 4.2 Curve Function: Pressing the curve button enters the curve screen, which automatically detects various specified monitoring quantities, including data such as current, voltage, frequency, and power factor reflecting real-time operating status, conveniently providing real-time monitoring curves for specified parameters. 4.3 Historical Data List Function: Pressing the historical data button enters the historical data table. The historical data list function automatically detects and stores specified monitoring quantities, and can display different types of data in multiple different tables. The selection keys allow easy selection of the desired table screen, and the data record for that specific time can be retrieved by entering a specific time. 4.4 Alarm Record Viewing List Function: Pressing the alarm record button enters the alarm information browsing table, which is mainly used to store fault alarm information of the monitoring system. The operator can also retrieve the system fault record for that specific time by entering a specific time, and can print the record. [align=center] Figure 3 Alarm Record Screen[/align] 5 Implementation and Effect of Monitoring Function of Variable Frequency System The monitoring and control system after programming integrates real-time display, process control, data acquisition, data transmission, engineering reports, historical curves and real-time curve display functions, and can save and print historical data for system analysis. It can perform the following functions: (1) Real-time monitoring of equipment working status to realize real-time management of the entire production process. The operating status of high-voltage frequency converters is very important, and the establishment of the monitoring system provides real-time dynamic information for management departments, which can effectively help on-duty personnel to understand the working status of equipment in a timely manner. (2) Provide flexible real-time curve and historical curve display functions. By comparing current and historical trend data, especially combined with the multi-parameter model of equipment safe operation, potential faults can be reported early. (3) Real-time report management conveniently solves the on-site timed data copying, maintenance and tedious data processing work. Recorders no longer need to spend a lot of energy filling in reports every day, which improves the company's office automation capabilities and management level, and achieves significant economic and social benefits. (4) Data-driven and networked management improves the transparency of enterprise data and eliminates human factors, and incorporates cost accounting into a more standardized management system. (5) The monitoring system has the advantages of user-friendly interface, easy operation, reliable operation, easy modification, expansion and upgrading. At the same time, the system cost is very low and has a high cost performance. 6 Conclusion The system has been put into actual operation, realizing online real-time monitoring and control of various parameters of high voltage frequency converter, and has achieved good results in actual use. It has strengthened the monitoring of high voltage frequency converter by functional departments and standardized the behavior of employees. It has realized the systematic management of high voltage frequency converter, improved the reliability of frequency converter operation, and ensured the safe operation of the site. References: [1] Pan Xinmin. Microcomputer Control Technology [M] Beijing: People's Posts and Telecommunications Press, 1998, 215-239. [2] Beijing Kunlun Tongtai Automation Software Technology Co., Ltd. "MCGS Embedded Version Full Chinese Industrial Control Configuration Software User Manual" [3] Ma Guohua, Monitoring Configuration Software and Its Application [M] Beijing: Tsinghua University Press, 2002. [4] Zhang Yonghui Development of High Voltage Variable Frequency Speed ​​Regulation Technology in my country Variable Frequency World, 2004, No. 5