The container of the automatic bulk additive Filling machine is filled with the material to be filled. The filling head begins to inject the material into the container. At the same time, the Electronic scale filling starts to work, monitoring the weight of the material in the container. As the material is continuously injected, the electronic scale will provide the real-time weight information of the material to the control system. The control system, based on the feedback from the electronic scale, precisely controls the opening and closing of the filling head to ensure that the weight of each container meets the preset standard. When the weight of the material in the container reaches the preset value, the control system will instruct the filling head to stop filling, and then the container will be sent to the next process. 

The automatic filling machine can directly observe the operation status of all production equipment related to the Weighing system on the control CRT. In the picture, animation indication functions are set for moving equipment such as motors. The PROFIBUS system composed of the master station and the slave station has a token logic ring structure. When a master station receives a token message, it can execute the master station's work within a certain period of time. During this period, it can communicate with all slave stations according to the master-slave communication relationship table or according to the above, with the master communication relationship table communicating with all master stations. The programming interface and data viewing interface in TEP7 provide two views: offline and online. It adopts a two-stage large and small material adjustable explosion-proof electronic scale filling method, which improves accuracy and production capacity; the electronic scale measurement method uses imported sensors, has a long service life, stable weighing, and a fast vacuum suction system to ensure no dripping or leakage, and a slow dual-speed filling method to ensure filling accuracy. 

The Liquid filling machine adopts a two-level control system composed of a computer control unit and a PLC. It communicates via TCP/IP using the MODBUS Ethernet conversion module. The PLC communicates with the on-site weighing instrument, feeding, filling and conveying frequency converters using the MODBUS protocol to complete the centralized management of the entire process. The configuration software is used to realize the dynamic monitoring of the filling process progress and the real-time monitoring of the working status of each device in the system. It can also print the filling data, alarm records and faults. The MODBUS communication protocol is used to achieve real-time data exchange between the PLC and the weighing instrument, frequency converters, etc., to complete the processing and calculation of the filling data and the control of the filling process, achieving the purpose of centralized management and decentralized control. 

The metering filling machine mainly measures the motor's conveying volume through the rotor pump. The weighing instrument receives the weighing signal and speed signal, processes them and converts them into target values and instantaneous flow rates. The target values and instantaneous flow rate signals are transmitted via RS-485 to the industrial control computer (upper computer) in the form of MODBUS current signals and sent to the PID regulator. The regulator compares and operates the signal with the internal set value, and then the MODBUS signal is sent to the frequency converter. The frequency converter then adjusts the motor's speed. When the flow rate increases, the motor speed is reduced; conversely, the motor speed is increased. Thus, the flow rate of the material and the stage target volume remain within the set range, resulting in reliable product quality. The parameters and operation process can be set and monitored through the industrial control computer, or the values of the PID regulator can be manually modified. The operation is convenient and the control is reliable. The entire system achieves high-level automation and forms a relatively independent yet interrelated closed-loop control system.