The main electrical control part of the filling machine is a Siemens S7300 series PLCCPU317-2PN/DP. The filling valve control part is a control system module EX484. Siemens PLC is responsible for the safety functions, speed control, high level buffer tank level control, return cycle heating, CIP in-situ cleaning, height adjustment, signal exchange, etc. The control system is composed of Siemens PLC buses. Siemens PLC control system consists of two buses, Profibus and ASI bus. The filling machine is responsible for filling valve metering cylinder level control, tank filling level control, filling valve pneumatic control, filling angle time control and so on. The filling valve control is composed of two buses: Powerlink bus and CANbus bus.

The filling machine calculates the position information of the circular filling port in the image of the barrel cover surface, namely the filling port radius, the filling port center mark and the height of the oil gun. The corresponding position information is transmitted to the stepper motor control system, and the motor control system drives the shaft stepper motor according to the pulse instruction issued by the computer, and drives the oil gun to run above the filling port to realize automatic positioning and filling.

Propanol filling machine is driven by stepping motor to drop down to reach the lower limit position, the well is signaled by the travel switch, and the PLC controls the filling valve to open fully for filling. The use of local area network realizes the communication between the field computer and the equipment, through the RS485 network can communicate with the filling machine each other. The use of multiple filling machines can easily constitute a RS485 distributed control system network.

The ton barrel filling machine adopts manual and automatic control scheme, PLC is responsible for collecting the target value input signals and sending control commands to the actuator after program processing. The material filling display window is established, database variables are created and attribute definitions are completed. Through the means of attribute definition, space, strategy, etc., complete the design of dynamic screen, set up the storage attributes of data variables, establish data query and curve browsing. Establish communication connection and parameter setting of external equipment to realize remote monitoring and data management function.

The liquid filling system is digitally processed by a computer or a dedicated image processing module, which performs the recognition of size, shape, color, etc. based on the information of pixel distribution, brightness and color of the image. The weight of the converted liquid is transmitted to the metering and filling mainframe through a functional relationship measured by the weighing module, and this data is compared with the mainframe's rapid collection, real-time processing, and the settings of the corresponding components in the recipe.

Dyestuff adding machine completes the collection of analog and switching quantities required by all filling systems through AI and DI modules to meet the needs of control points in the filling production line. Adopting fully automatic barrel sorting and picking equipment accelerates the conveying speed . It adopts full-automatic production from the picking up of barrels, only need to place the barrels of the same specification and model neatly in the designated position, the professional manipulator will accurately take out one barrel at a time, and accurately convey the barrels to the bottom of the filling nozzle through the power rail.

The calculation and filtering of lubricating oil filling machine set data and PID control algorithm to adjust motor current after weight feedback are completed in the corresponding program. The dynamic data exchange technology is used to realize the data acquisition and transmission of the production site, and the data interaction is completed to make up for the shortcomings of complex control algorithms and data processing.

The cream canning machine realizes the quantitative filling of liquid by collecting the data from the weighing module. It needs to measure the filling quantity and display it in real time. The filling system adopts weighing module and weighing instrument to realize the measurement of canning quality. In order to ensure the filling accuracy, the system adds a solenoid valve at the front end of the pump to ensure that the liquid inflow can be turned on and cut off immediately when starting/stopping.

Methanol auxiliary filling machine adopts two-stage automatic filling method of size material, adopts barcode recognition, wireless transmission, automatic weighing, PLC control, mechanical and electrical, computer interface and other automation technologies, and independently develops intelligent filling weighing and inventory management system to prevent wrong materials in filling, ensure weighing accuracy and ensure the accuracy of filling process. Each batch of filling data is recorded and traceable, and the principle of first-in-first-out is followed when the raw materials are sent out, which effectively solves the waste of raw materials.