The mixing scale manually controls the start and stop of the batching process through the control circuit, and realizes the communication management of each control by Siemens PLC, frequency converter and weighing instrument. The RS-232 asynchronous communication interface is connected to the PLC after level conversion, forming a physical channel for the communication of the upper and lower machines. The RS-232 port of the host is connected to the communication port of the weighing instrument. In the process of PLC control, the connection command is used to monitor the running state of the lower computer and the content of the data area. The internal state of the PLC and the real-time data of the weighing instrument are displayed on the upper computer.
020-34563445The weighing sensor is installed in the mixing scale device, and is connected to the industrial computer. Manually check the zero of each weighing hopper when it is stopped, and automatically check the zero during continuous batching operation, which can correct the change of the zero position of the weighing hopper and ensure the measurement accuracy.
After the start of the batching operation process, PLC controls the pneumatic valve and screw of the first material feeding, and the material is slowly added to the weighing hopper. The computer monitors the signal transmitted by the weighing and measuring sensor in real time, and compares it with the target value set by the formula. When the target value set by the formula is reached, the PLC control output is disconnected, and the pneumatic valve and screw of the first material feeding are closed. After stabilization, the total weight of the weighing hopper and the added material is measured, and this value is used as the zero position before the second material is added. Then the feeding process of the second material begins, and so on to the second, third,... Until all materials are fed.
Through the process of weighing and feeding, formula control, mixing homogenization, material conveying, etc., the use of microcomputer control and data management as one of the integrated automation system, the use of Mitsubishi or Siemens series PLC and industrial control microcomputer to establish a high-performance control platform. In order to design an automation system for production control, it is necessary to achieve stable and reliable operation, simple and practical operation, and superior cost performance.
Industrial control microcomputer, Mitsubishi or Siemens series PLC communication module and switching input/output module, as well as manual/automatic control switch, manual control button and indicator light are installed in the integrated control cabinet, easy to operate;
Customized according to the basic requirements of the batching scale and the actual needs of users;
High precision weighing module combined with weighing control instrument;
Using pneumatic valve control, screw frequency conversion for feeding and discharging control;
Configure related mixing equipment according to material mixing and customer requirements;
Screw feeding or pneumatic feeding is used to feed the specified position.
