The weighing of oil heating reactor is realized by the computer distributed control system itself, that is, no additional computer hardware is attached. With the control system composed of network communication, the requirement for the control software of the reactor is not only how powerful its function and how rich its content, but the demand for the user's redevelopment ability of different objects is becoming increasingly important.

The dosage system enters directly into the corresponding weighing controller through the signals of the weighing module. The weight signals are transmitted to the programmable controller through the serial port or through the Modbus protocol weighing controller. The programmable controller controls the final control valve of the dosage in each bin according to the dosage weight, in order to increase the required dosage weight. The communication with the configuration is realized by using 485 bus. S7-200 series has the functions of recipe setting, dosage control, dosing, report printing, remote alarm and other functions to realize remote monitoring.

The overall composition of the dosage system is that the host and the slaves (including the virtual host) are connected via serial bus, and the virtual host and the slaves are also connected via serial bus, constituting the master-slave microcomputer dosage of the dual-bus structure, the host realizes the control of the dosage through the serial president, and the virtual host realizes the control of the dosage through the serial bus after obtaining the right to control the system, and the host mainly completes the control of the process, real-time display and alarm, and provides data storage. The host mainly accomplishes the functions of process control, real-time working condition display and alarm, data storage, report printing, recipe optimization and management consulting.

The automatic batching system is developed with the central processing system as the core, each weighing controller controls one weighing scale, which directly controls the batching process and accomplishes the tasks of data collection, processing, storage and display, fault detection and alarm, data communication, etc. The automatic batching system can be used for the real-time display of the batching process and the data communication. Real-time display of the dosage process, data storage and report printing, and directly involved in the control of the feeding and discharging action of each scale. The control system is a multi-channel data acquisition unit, installed in the production site, responsible for the data acquisition and local display of the weighing signals and liquid level signals, and sends the acquired data to the host computer for processing through the serial bus.

Dosage systems utilize dosage control in various areas such as in-line cleaning and sterilizing, and process manufacturing. It is also possible to monitor the system, track parameters, signal alarms, record data, and chain control. Can change the dosage ratio and formula, can be adjusted through the programming, quickly change the device of the material drop. From the industrial control machine, the formula is sent to the PLC, the weigher communicates with the PLC in real time through the field bus, and the PLC controls the automatic weighing of the whole formula, and by monitoring the whole automatic weighing process in real time, it realizes the intelligentization of the automatic weighing.

The automatic dosage system realizes the automation of weighing and dosage, the weighing and mixing of each powder is realized by the programmable controller (PLC), the upper computer is mainly used for the formula management, man-machine dialogue and the storage and printing of weighing data. Using the upper computer and weighing instrument communication program, weighing data collection, and data stored in the Access database. It facilitates the querying and tracing function of the data, which not only facilitates the supervision of the weighing process, but also restricts the operation of the workers. v

Reaction pot weighing system to be weighed after the start of the weight signal and speed signal to the weighing instrument, through the amplification of the A/D conversion, calculated instantaneous flow and cumulative amount, and displayed in the field weighing instrument. The indicator uploads the signals to the PLC module, the PLC analog input module collects the weight signals and speed signals from the screw and feeding device, and carries out the self-tuning operation according to the parameters set by the user, and the level weight of the materials in the reaction tank measured by the weighing module of the reaction tank regulates the flow rate of each downstream port of the dosage reaction tank, so as to guarantee the balance of the inlet and outlet of the mixing and storage tanks.

The distillation tank weighing system adopts a computer with stable performance to complete the data acquisition and communication processing, which is convenient to provide processing accuracy and cost reduction, and the data output and management are carried out through the COM communication interface of the computer itself; Mitsubishi F900 touch screen is chosen to replace the conventional weight indicator to do the human-machine interface, which makes the programming of the interface between PLC and weight indicator become simpler, and enables the display function to be enhanced. The weighing system is to add two or more kinds of materials to the mixing tank automatically according to a certain weight ratio, and then automatically discharges the materials after mixing to meet the predetermined requirements.

The weighing system of the reaction tank is transmitted to the central control room for centralized monitoring and management through high-speed network, and the host computer of the central control room also transmits control commands to the PLC measurement and control terminal through high-speed network to implement decentralized management of each unit. Integrating computer technology, automatic control, communication technology, weighing technology as a whole, its control function is perfect, display, operation is centralized, data processing is convenient, installation, maintenance is simple, the system is easy to expand.