The explosion-proof Weighing system mainly relies on PLC as the core control unit to achieve the basic control function of weight reduction. The system expands the touch screen operating system and the human-computer interaction interface. Its functions include heating the ingredients, fine-tuning the mixing components, dilution, decomposition, mixing and blending, control of inclusions, and uniform temperature processing to improve quality. It is an important production link between resin and ingredient processes, capable of coordinating the production rhythm of weighing and more. Among them, adding controlled amounts of powder to the ingredient materials for blending to precisely control the chemical composition of the ingredient materials. 

The variable quantity weighing control system enables two or more different substances to be dispersed and mixed with each other, achieving variable frequency mixing and weighing. When the Electronic scale is started, the PLC sends a dynamic measurement start signal to the weighing control instrument. The weighing instrument then begins to collect and display the weights of each stage, and adopts fast and slow opening in different weight stages. When the target value is reached, it outputs a stop measurement signal, which is controlled by the PLC to close the relevant valves, pumps, etc. above the weighing platform. At the same time, the unloading action is completed, and the weighing control instrument automatically clears and resets the weight. 

The weight reduction weighing system is realized through a programmable intelligent module, an industrial control computer and the RS485 fieldbus for signal acquisition, processing, control and output. It constitutes a cost-effective weighing system. A local area network is adopted to achieve communication between the on-site monitoring computer and the management computer. The weighing software is developed using the modular method with VC++. The actual operation shows that the system is reliable in operation, convenient for maintenance and use, and has a friendly human-machine interface with good control effect. The weighing system starts from the feeding pump of raw materials and continuously delivers qualified materials to the material tank above the weighing platform. It includes the control and interlock of all feeding and discharging valves, the start and stop of each material feeding pump, the control of fast and slow feeding, status detection, and all data processing functions. The weighing control system consists of the weighing unit, the data processing unit and the control unit. 

The weighing platform monitoring system has an alarm function, which can provide real-time alarm notifications, implement voice alarm notifications, and remotely notify with information. It can also store and query historical alarm information. During the control process, one can view and modify the alarm parameters of each system variable. It realizes human-computer interaction, enables modification of process parameters, and displays main parameters such as temperature and time. It can be combined with temperature control instruments to achieve PID parameter adjustment and can set and calculate PID parameters in the running system. It can realize dynamic simulation display of the working status of the weighing platform, and can visually display the current production operation status of the weighing platform and the current values of various control parameters on the weighing platform body. It can provide remote data access function for the client. 

The weighing platform control system includes conventional control, complex control, logic interlock control and sequential control. According to the instructions of the operator, it automatically completes the sequential control tasks at each stage and accomplishes the sequential control in the homogenization and blending stages. By connecting other functional blocks with the control process I/O and software I/O, it can automatically set the loops, change the control mode, output various information, call various formulas and achieve sequential and interlock control. The control program for the homogenization process is a universal program for each production line. Only one weighing platform above can start the homogenization control program at a time. The homogenization control program is mainly realized by sequential control tables, and the vacuuming, addition of different additives, and cleaning processes are realized by independent motors. It is achieved through multiple calls, single-step execution, and skipping some common homogeneous programs. By leveraging the powerful functions of the weighing platform, a comprehensive control scheme for the weighing platform system is realized. The sequential control program is flexibly applied to basically control the temperature within the set temperature range, thereby stabilizing the process parameters and improving the control quality of the weighing platform.