The system adopts a generalized monitoring system hierarchical structure, and the whole system is divided into PLC control level, upper computer monitoring level and management monitoring level. The PLC uses Mitsubishi FXON-60MR to complete the data acquisition and underlying control process. The process flow mainly includes three parts: Firstly, the length of the steel plate detected by the photoelectric encoder is sent to the CRT of the upper computer through the PLC; secondly, the upper machine can issue instructions such as starting and stopping, manual automatic switching, etc., and the above command signal Dynamic sampling, displayed on the CRT; Finally, the force control software is used to compile the software interface.
Development environment Draw, runtime environment View and database DB are the basic components of force control. Draw and View mainly complete the development, configuration, operation and display of the human-machine interface. The real-time database DB mainly completes the collection of real-time data (through the I/O Server program), the processing of real-time data (including alarm processing, statistical processing, etc.), and historical data processing. The interface system can be used with the database system or it can be used alone.
The objectives to be achieved by this monitoring system are as follows: 1 Create a process flow diagram including belt conveyor, photoelectric encoder, pressing device, knife, baffle and sorting mechanism; o shearing knife according to shearing state The color is changed, it is red when cut, and it is green when it is not cut; the real-time database is created, and the dynamic data display of a process flow chart is completed; the start and stop of the PLC program are realized by two buttons. A graphical interface (partial) made for the actual situation.
Leaf spring automatic cutting production line monitoring system graphical interface PLC If you add an expansion card, you can use special protocol and computer communication. The power control software in this system communicates with FXON series PLC through FXON-485ADP communication module of Mitsubishi PLC. This agreement can be Use serial communication to communicate with Mitsubishi PLC using the serial port in the computer. FX series PLC supports two communication modes: RS232 and RS485 communication protocol without protocol. The communication mode is changed by changing the value of D8120. The recommended values ​​of the PLC serial port parameters are shown in Table 1.
The system has the following animations: the transmission of the conveyor belt, the action of the pressing device, the action of the shearing knife, the movement of the baffle and the movement of the binning mechanism. The animation connection is used to establish the correspondence between objects and data variables in the screen. In the development environment Draw, the animation is connected to make the graphics move along with the changes of the PLC data on the screen, and the script function of Draw is used to enhance the corresponding program. Logic control capabilities. When the system is running, if there is a problem, an alarm will sound. At this time, the corresponding bit number can be determined according to the time in the alarm record table to find the problem.
Summary The leaf spring automatic shearing production line monitoring system has high automation degree, stable operation, reliable performance and convenient maintenance. The upper computer monitoring program developed by the configuration software is friendly, easy to operate and practical.
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