Automatic filling machine by the programmable controller and electronic scales to form a two-stage computer control network, through the field bus to connect the field weighing instruments, control computers, PLC, inverters and other high degree of intelligence, fast processing speed equipment. PLC is mainly responsible for automatic filling machine fault detection, display and alarm, and at the same time, to the frequency converter output signals, frequency converter to complete the regulation of the role of the speed of the electronic scales.

Electronic scale weighing is the instantaneous flow, the host computer is given to set the flow, the two in real-time measurement deviation. Automatic filling machine using industrial control in the most widely used PID regulation for the actual control of the flow, according to the flow deviation, the use of proportional, integral, differential calculation of the amount of control, through the frequency converter to adjust the speed of the electronic scales, adjust the amount given to the amount of the set value is equal to complete the automatic filling process.

Automatic filling machine to open the automatic filling after the conveyor began to run, the main control system to exercise the PLC to do the main control elements, photoelectric input signals servo motor action cylinders, etc. for the output components. Automatic filling production online real-time monitoring, microprocessor through serial communication with the PLC real-time data processing and data entry based on the precise control of the industrial computer and PLC. Fully intelligent upper computer industrial computer constitutes a two-stage filling control set of electromechanical signal processing and communication as one of the filling equipment, reasonably share the upper monitoring and on-site data acquisition and control tasks.

Liquid filling machine with memory function, manual and automatic control scheme, manual control is mainly used for emergency treatment and process debugging, automatic control of the core unit for the PLC, the core part of the control for the Siemens S7-200 PLC, PLC is responsible for the acquisition of input signals, programmed to the executive body to send out control commands. the PLC and the upper computer is connected through the communication cable, the input signal While transmitting to the PLC, the PC will also obtain the data and display them synchronously through the Configuration King. Establish the material filling display window, create database variables and complete the attribute definition. By means of attribute definition, space and strategy, complete the design of dynamic screen, set the storage attribute of data variables, and establish data query and curve browsing. Establish communication connection and parameter setting of external equipment to realize remote monitoring and data management function.

The automatic filling machine automatically removes the tare weight when filling, and the material is injected into the container with a large amount of fast filling followed by slow and small dose correction measurement. Containers into the weighing platform when the conveyor is running at the same time, photoelectric sensor detects the arrival of a container after the signal sent to control the motor to stop. Photoelectric sensor detects the signal issued when the container reaches the filling position, the PLC controls the conveyor to stop, the automatic tare and filling valve is driven down by the stepper motor to reach the falling limit by the travel switch sends a signal, the PLC controls the filling valve is fully open for filling. When it reaches the set value, the solenoid valve operates the filling valve half-open for filling, and the stepping motor drives the filling valve up through the screw according to the pre-set speed at the same time of filling. When the filling weight requirements are reached when the filling valve is closed, the filling valve reaches the upper limit of the travel switch stop signal, PLC at the same time to control the motor scale conveyor running to the finished product output, and then will be placed into the container electronic scale platform, the mouth of the barrel aligned with the filling nozzle, at this time the program is started, the filling nozzle automatically down, open the filling valve feed, when the set amount is automatically stop filling, filling nozzle rise, complete the filling process. In order to ensure the accuracy and reliability of the filling process of the various parts of the device action, through the PLC program on the various sensors, relays, switches and solenoid valves for control. After the filling barrel is placed on the conveyor belt, the conveyor transfers it to the filling position, the proximity switch arranged in the filling position automatically senses and transmits the sensing signal to the PLC control system, the PLC controls the conveyor motor to stop rotating, and at the same time controls the lifting cylinder to drive the roller arm to rise up and move the filling barrel to the filling gun position, and the photoelectric sensor on the port of the filling gun automatically senses the position of the filling barrel, and at the same time, the suction cap device is activated to suck the cap away; then the filling nozzle will rise to the position of the filling barrel. At the same time, the cap suction device starts to suck away the cap; then the filling gun starts to fill the liquid into the filling barrel, and the weighing module transmits the weight signal of the liquid in the barrel to the PLC control system. When the weight reaches the predetermined weight, PLC controls the filling gun to stop filling, the cap suction device automatically seals the cap, and the conveyor motor is started to transport the filling barrel away.