The electronic belt scale transmits the material weight signal on the belt and the belt running speed signal to the on-site totalizer through the front channel weighing equipment and the rear channel weighing equipment installed on the conveyor. Inside the on-site totalizer, the weight signal is converted to a digital quantity by AD and transformed into a weight value by the built-in microcontroller; the speed pulse is transformed into a speed value by the built-in microcontroller and multiplied by the weight value to obtain the instantaneous flow rate; the two channels accumulate the instantaneous flow rate at the same time to obtain the totalized amount of the material in each of the two channels, which is saved in the internal non-volatile memory. When the two channels are normal, the remote display adopts the average value of the accumulated quantity of the two channels, and if one of the channels fails, the normal one will be displayed.

The weighing control system is mainly composed of three parts: automatic belt scale, electrical control system and computer management system. The system adopts the form of universal industrial computer human-computer interaction interface, with functions of data acquisition, control, alarm, graphic and data display. According to the set requirements to complete the material proportioning control and various data management in the production process. By the built-in single-chip computer for scale conversion to speed value and multiply with the weight value to get the instantaneous flow, two channels at the same time constantly on the instantaneous flow accumulation to get the two channels respectively of the cumulative amount of materials, saved in the internal non-volatile memory. When the two channels are normal, the remote display adopts the average value of the accumulated quantity of the two channels, and if one of the channels fails, it adopts the display of the normal one.

Main Functions and Features

Running Mode.

Automatic mode: by selecting the pre-set formula on the industrial control machine, the system is started after the formula is determined. The dosing system automatically controls the operation of each weighing Feeder according to the setting of the formula.

Semi-automatic mode/manual mode: by manually setting the proportion of the formula on the controller, starting the controller manually, and the controller controls the frequency converter and the weighing feeder to add materials.

Data acquisition and control function

The system collects data sent in the form of digital quantities from on-site equipment, and realizes monitoring and control functions through the operation of real-time data. A real-time database is provided to help monitor the production process.

The system provides equipment screens with real-time updated data displays and a large screen showing the entire operation process, making it easy to observe the entire production process. Data displayed includes operating mode, flow rate, totalized volume, set point, deviation and other similar data. The Dosing System Display simulates the front operator panel of a dosing scale meter on the screen, allowing the operator to monitor and set up remote meters from the control room.

Data and History Recording: (data logs that record cumulative volume, flow rate, material level and/or other relevant data)

The automatic belt scale system's data logger collects data from each device, maintaining a record of operating cumulative volumes and events. These data logs retain current and historical data, run continuously and provide ready access. Statistical options provide graphs and alarms based on real-time processed data, allowing operators to monitor and adjust individual production processes.

Graphical Interface:

Provides a graphical approach to system control configuration. Makes the application easy to develop and maintain. Individual attributes and their display characteristics can be selected and placed on the screen via extended lists. User-defined displays can be immediately displayed on the screen, so what you see is what you get!

Alarm control and management:

Continuous monitoring of the production process and timely alarming of potential problem areas. User-defined upper and lower alarm limits are available through the alarm configuration. Alarm information can be composed through the screen, printer, Email and other ways. Alarm files are formed and stored in the database, and operation information is automatically recorded. The operator's screen of the dosage scale control system provides a quick and intuitive tool for analyzing the production process. Accordingly, the operator can quickly acknowledge, analyze and discriminate alarms, carry out the required process adjustment control operations, and monitor the control equipment based on images directly from the computer.

Historical Trends:

The historical trend graph displays a history of changing data, and the control system provides historical data and trend display functions for off-line data analysis. The historical trend display function can be used to represent various trends in a curved manner and can show the dynamic relationship between different variables. Historical files formed from historical data can also be exported to other management programs for further detailed analysis.