Abstract : Based on practical engineering experience, this paper analyzes the current status of elevator monitoring systems both domestically and internationally. Combining computer configuration technology, it proposes a scheme for designing an elevator monitoring system based on MCGS industrial control configuration software. This system uses computer-generated animations to simulate elevator operation, directly, intuitively, and accurately reflecting the actual operating status of the elevator. It promptly alarms for faults in the elevator system, analyzes and judges the causes of faults, and allows direct computer control of elevator operation. Keywords: elevator; MCGS; remote monitoring [align=center]Based on MCGS Elevator Remote Monitoring System Design Chen Fei (Xinjiang Uygur Autonomous Region Special Equipment Examination Research Institute, 830000)[/align] Abstract : Based on actual project data, this paper analyzes the basic situation of domestic and foreign elevator supervisory systems, unifies computer configuration technology, and proposes a controlled configuration software design plan for an elevator supervisory system based on MCGS labor. This system applies computer construction animation to simulate elevator movement, providing direct, direct-viewing, and accurately reflecting the actual running status of the elevator. It promptly issues warnings to indicate elevator system breakdown, analyzes and diagnoses the cause, and can positively govern elevator movement through the computer. Key words : elevator; MCGS; remote monitoring 0 Introduction With the acceleration of urbanization, elevators have become an indispensable means of transportation in people's daily lives, and their operational reliability has become a focus of attention. Therefore, the development and research of elevator monitoring systems has very important practical significance. The purpose of elevator monitoring is to enhance elevator management with minimal personnel, providing a more intuitive, clear, and accurate elevator operating status, thereby offering multiple possibilities for maintenance and fault diagnosis and significantly improving system efficiency. This paper, starting from practical engineering, comprehensively analyzes the current status of elevator monitoring systems both domestically and internationally. Combining computer configuration technology, it proposes a scheme for designing an elevator monitoring system based on MCGS industrial control configuration software. The system uses a network to collect real-time elevator data through the computer's serial port, and uses the computer to construct animated simulations of elevator operation, directly, intuitively, and accurately reflecting the actual operating status of the elevator. It promptly alarms for faults in the elevator system, analyzes and judges the causes of faults, and can directly control the elevator's operation via the computer. 1 System Overall Design Figure 1 shows the overall system block diagram. In the figure, the main control computer is connected to multiple PLCs through an RS-232/485 converter. Each PLC is assigned its own address for identification, allowing the host computer to communicate serially with all the PLCs (slave computers) connected below via a 485 communication line, realizing distributed control of the elevator. [align=center] Figure 1 System Overall Architecture Diagram[/align] 2 Development Environment The system's upper-level computer monitoring part is implemented using MCGS (Monitor and Control System) configuration software. MCGS is a configuration software system based on the Windows platform for quickly constructing and generating upper-level computer monitoring systems. MCGS provides users with a complete solution and development platform for solving practical engineering problems, capable of performing functions such as on-site data acquisition, factual and historical data processing, process control, animation display, trend curves, and report output. The MCGS software system consists of two parts: a configuration environment and a runtime environment. The configuration environment is equivalent to a complete set of software tools, helping users design and construct their own application systems. The runtime environment runs according to the configuration project constructed in the configuration environment, in the manner specified by the user, and performs various processes to achieve the goals and functions of the user's configuration design. The runtime environment itself has no meaning; it must be used together with the configuration result database to constitute the user's application system. Once the configuration work is completed, the runtime environment and the configuration result database can run independently on the monitoring computer, leaving the configuration environment. The MCGS configuration runtime environment is shown in Figure 2. [align=center] Figure 2 MCGS Configuration and Operation Environment[/align] 3 Elevator Monitoring and Analysis The PLC can collect elevator operation status parameters in real time, such as instructions, calls, operation mode, door opening and closing signals, etc.; dynamically display the elevator operation status, such as direction, position, door opening and closing, leveling, etc.; promptly analyze and judge faults, prompt and inform maintenance personnel, and carry out emergency handling. 4 Design Process (1) Create monitoring interface. It is worth noting that 16 elevator monitoring screens were created in this process. This is to achieve the purpose of real-time monitoring, because after entering the operation environment, the elevator may be at any floor. These 16 windows list the possible initial screens of the elevator. After entering the operation environment, the screen can be called according to the specific conditions. (2) Establish real-time database. The real-time database is the core of the MCGS system and is the data exchange and processing center of various parts of the project. It connects the various parts of the MCGS project into an organic whole. In this process, the various internal and external call signals corresponding to the elevator are defined for use in attribute setting and programming. (3) Set screen attributes. Connect the various switch-type or numerical variables defined in the real-time database with the corresponding buttons, indicator lights, etc. in the monitoring screen so that the animation can move as required. (4) Communicate with PLC. Select the COM port programming protocol in the device window to establish the device channel, and match the various variables defined in the real-time database with the corresponding I/O allocation in the PLC. Monitor by reading and writing signals in the PLC. This is the most critical and important part of the whole process. (5) Alarm analysis. Alarm analysis is an important part of the elevator monitoring system. Various faults may occur during the operation of the elevator. At this time, the monitoring system should be able to detect the fault type and organize the alarm. The alarm situations involved in the system are mainly: ① The elevator does not stop at the level for some reason. The solution is to make the elevator go up or down to the nearest level and stop; ② The elevator cannot open or close the door normally. That is, after the elevator runs to the designated level, the door cannot close normally. At this time, the relevant personnel are notified to carry out maintenance through fault detection; ③ The elevator runs beyond the up or down limit. The solution is to initialize the elevator to the 1st floor level; ④ The elevator car is overloaded. At this time, a bell will be rung to inform the user. In addition, there is an emergency button in the elevator car. When the elevator malfunctions, the user can press the button to inform the monitoring system so that it can be repaired as soon as possible. (6) Complete the script program. The script program includes the elevator door control part, the car going up or down part, the part to call the screen when entering the operating environment and the alarm part. 5 System debugging (1) Offline debugging of the monitoring system After the monitoring interface is completed, the first thing to do is to debug offline so that the elevator can respond to the internal or external call signal, and go up or down according to different signals, and the elevator door opens and closes in time. This requires good programming skills and a good grasp of the MCGS script program programming environment and programming statements. To ensure that the elevator moves well, the animation interface attributes must be set completely correctly and correspond to the data variables in the real-time database. Then, the operation of the screen is controlled by the script program. Since there will be monitoring systems for parallel or group-controlled elevators, various situations during elevator operation must be considered, as well as many factors, such as signal overlap. At the beginning, we encountered the following problem: when the call signal for the first floor of elevator 1 is pressed, elevator 1 opens its door. Then, when the call signal for the second floor of elevator 1 is pressed, the elevator rises to the second floor, but immediately returns to the first floor. The elevator keeps running between the first and second floors because the first floor signal is not cleared. Since there are many signals from the two elevators, we need to consider all situations at the same time to ensure that all signals do not conflict. (2) Communication debugging with PLC After the initial screen operation is completed, we start the communication debugging with PLC. First, we select the serial communication parent device and set various attributes. Then, we select the PLC device, establish input and output registers, and connect the channels. We encountered many problems during the connection process. For example, after setting various channel values, the communication flag always showed 1, which means that we did not communicate with the PLC. If the communication is successful, the communication flag should show 0. After multiple tests, we finally solved this problem. The next challenge was communication between multiple elevators. Despite identical setup, only one elevator could communicate normally. Analysis revealed that the PLC programming protocol selection was incorrect, as the PLC programming port supports one-to-one communication, while the COM port supports one-to-many communication. After considerable effort, simultaneous communication between multiple PLCs was finally achieved. Finally, monitoring and controlling the PLC's operation was crucial. This simply required selecting the correct signal as the programming object. However, signal selection requires experience; otherwise, the program cannot be simple and practical. 6. Conclusion: The MCGS configuration software is powerful, easy to operate, and user-friendly. Ordinary engineers can quickly master the design and operation of most engineering projects after a short training period. The author's innovation lies in enabling the observation of elevator operation dynamics on the MCGS-configured monitoring interface on the host computer. It can reflect the elevator's operating status and comfort in real time, and can proactively analyze potential elevator malfunctions, allowing engineers to focus on solving the engineering problems themselves. Therefore, developing a remote elevator monitoring system has significant practical implications. References: 1. Ai Xiuying. Configuration Control Technology [M]. Beijing: Electronic Industry Press, 2003. 2. Liu Bin. Application of MCGS in PLC Experiment Teaching [J]. Industrial Control Computer, 2006, 17. 3. Zhang Cunrong. Remote Elevator Monitoring System [J]. Microcomputer Information, 2006, 2. Author Biography: Chen Feinan graduated from the School of Electrical Engineering, Xinjiang University, majoring in Control Theory and Control Engineering, with a Master of Engineering degree. He currently works at the Xinjiang Uygur Autonomous Region Special Equipment Inspection and Research Institute. Contact number: 13999852879 Email: [email protected] Mailing address: Special Equipment Inspection and Research Institute, No. 9, Mianhua Street, Changjiang Road, Urumqi, Xinjiang, 830000, China.