The weighing variable-frequency Batching system is an integrated mechanical and electrical system that combines automatic control technology, measurement technology, weighing technology and computer management technology. It has the advantages of digital display of weight values, dynamic display of process pictures, modification and management of formulas, fast batching speed, and high control accuracy. It adopts a complete screen system of the upper computer, featuring automatic storage of batching data, query of batching process lists, statistics and printing of shift, daily, monthly and annual reports. 

The automatic batching machine is composed of a weighing module, weighing instrument and communication cables. It adopts the combination of PID regulation to adjust the measurement deviation and variable frequency speed control, including the hardware settings, parameter settings and software design process in the variable frequency control. The multiple output lines of each batching conveying production line are strictly coordinated and controlled, and the material level weight is monitored and adjusted accurately and promptly. Through the bus connection, the on-site weighing instruments, controlling on-site equipment, weighing Feeding machine frequency converters, etc. are linked. It has a high degree of intelligence and fast processing speed. In the batching production process, the main material and auxiliary material are combined in a certain ratio to complete the measurement of the conveyed materials. It mainly undertakes the real-time control of the conveying and weighing processes, and completes the detection, display and alarm of faults, while outputting signals to the frequency converter to adjust the screw rotation speed. 

The feeding system mainly adopts the SIMATICS7-/300 series PLC. In the system, S7-/300 and the upper computer are used to implement two-level control of the main and auxiliary feeding machines. Each screw is composed of one drive motor, two level sensors, one speed sensor, one weighing sensor and one frequency converter. The switch controls the operation status of the motor. The input of the frequency converter control terminal is determined by the digital input of the PLC. The frequency converter generates high-frequency pulses and transmits them to the screw drive motor. The level sensor starts to detect whether there is material in the hopper, and the speed of the motor is monitored by the speed sensor. 

Description of the main functions of the ingredient system 

The manual operation and automatic control functions for ingredient input have been realized. 

Carrying out a visually appealing and practical dynamic simulation of the production process enables the display of the real-time working status of each material, as well as the target weight, actual weight and error value. 

Store preset formulas and be able to call, modify, delete and query the formulas at any time. 

During the ingredient preparation process, there is an automatic alarm function for material shortages. It is possible to manually replace the tank and storage unit numbers with the same materials online. 

It has the functions of operator permission management, on-site management and networked remote services. 

The industrial control computer is adopted as the upper computer monitoring system, and the WINCC monitoring configuration ensures the stability, reliability and long-term performance of the system. 

The system adopts a human-computer dialogue mode, making the operation and maintenance very simple. 

Remote management is achievable. The computer in the control room can be connected to the computer in the general manager's office. The general manager can view the production status and production reports in real time. 

By using a variable-frequency reaction tank for material discharge control, the accuracy of ingredient mixing is improved, thereby enhancing product quality and stability.