All the data input by the components of the weighing system serve the communication module. Click on the data change to display the latest data, and then the calculation can be carried out. The system will get the best S load, discharge quantity, control quantity and other production data required for batching according to the written process and algorithm.

The feeding system adopts Siemens PLC to control the automatic operation of all its interlocking devices (start-stop, interlocking, position switching and other operations), and the upper computer is programmed by Siemens WINCC configuration software. The whole configuration operation screen is embedded into the whole weighing system, and the operation of equipment start-stop operation, operation display, fault inquiry record and maintenance are carried out. The system has the characteristics of friendly interface, concise operation and reliable operation.

The weighing system has many functions, including Flash program memory, watchdog, EEPROM, synchronous/asynchronous serial port, TWI, SPI, A/D analog-to-digital converter, timer/counter, etc. It can be widely used in one, including reset system to enhance reliability, sleep mode to reduce power consumption and anti-interference, various interrupt systems, timer/counter with diversified functions such as input capture and comparison matching output, and I/O port with replacement function.

The weighing system measures the speed of spiral operation, converts it into corresponding pulse signal, and sends it to the computer after photoelectric isolation. The computer communicates with PLC to detect the flow rate and the running state of the feeding motor. After the instantaneous flow is calculated by the computer, it is compared with the required flow, and the computer outputs the corresponding speed regulating signal. After photoelectric isolation, DA is converted into a speed regulating signal of 4-20mA, and the operating frequency of the frequency converter is adjusted, so as to control the operating speed of the feeding motor and achieve the purpose of controlling the feeding amount.

The principle followed in the mixing process of weighing system is "raw materials with large proportion are added first, those with small proportion are added later, those with light proportion are added first, and those with heavy proportion are added later". The formula input should also follow this principle, but attention should also be paid to prevent the phenomenon of weighing in the batching process. In the batching process, the formula input should be adjusted according to the time from the start of batching to the opening and unloading of the mixer, and the middle section of the feeding time of a large proportion of raw materials should be placed in the opening and unloading time of the mixer, so that the amount of raw materials added will not be wrong due to weighing.

The weighing system can adopt fuzzy control, that is, compare the flow with the setting. If there is a big difference between the two, the adjustment range of the speed control signal is also large. If the two are close, the adjustment range is small, or even fine-tuning. Pre-judgment can also be added, that is, the speed control signal is controlled in advance according to the changing trend of the flow rate, and at the same time, the average value of the speed control signal in a period of time is used to generate dynamic upper and lower amplitude limiting of the speed control signal, which can effectively solve the phenomenon of large flow fluctuation and adjustment overshoot caused by poor discharge and other reasons.

In the batching system, the weight of the spiral material is detected by the computer combined with the measurement control and weighing module of PLC, and the corresponding electrical signal is output, which is converted into a 4-20mA current signal by the signal transmitter, and then converted into a digital signal with strong anti-interference ability and long-distance transmission after photoelectric isolation by the analog acquisition card, and sent to the computer. The weighing module detects the speed of the spiral operation, converts it into corresponding pulse signals, and sends them to the computer after photoelectric isolation. The computer communicates with PLC to detect the weight and the running state of the feeding motor.

The batching system uses programmable controller (PLC) as the core, and simultaneously controls multiple scales, different materials or outputs (depending on the process), intelligently controls batching time, and there is no waiting between batching scales, which shortens batching cycle and improves batching speed and output.

Intelligent batching system usually refers to a system in which a reaction kettle is used as a weighing container, and a variety of raw materials are added and mixed in turn during the stirring process according to preset procedures and weight values. A batching system that groups a variety of materials according to the similarity of weighing values, adds them into different weighing containers for measurement, and then mixes them together. Its characteristics are: fast weighing speed, high measuring accuracy and moderate investment.