The electric control system of asphalt mixing plant is one of the core parts of the whole asphalt mixing plant, and the stability of its operation affects the performance of the whole equipment.

asphalt control system consists of upper computer, burner control system, programmable control system, batching metering control system, asphalt heating transmission system, compressed air system, etc.. Position machine system uses two sets of commercial computer, built-in Siemens communication card CP-5613, Jie control configuration software (FAMEVIEW), Siemens step 7 programming software; lower position machine uses Siemens S7-300 series PLC module, including CPU, I / O input / output, analog input and output, PROFIBUS communication cards, etc.; the whole system has a hot standby function, even if a computer fails, the device can also be run as usual.

The concept of integrated automation control system is used in the system. All I / O signal, analog signal into PLC module, connected via PROFIBUS this main vein and two sets of PC; control the whole all in the S7-300 PLC, so that each part of the control can be a very good contact together, to achieve a unified control.

In order to achieve the high reliability of the system, the system uses SEW (or SIMENS) company's series inverter, and adopts PROFIBUS direct control to improve the stability of the system.

The system can complete the control of each working state, the data management of batching measurement, etc.. At the same time, with the perfect protection measures, real-time monitoring of all parts of the upper computer interface, and make the corresponding instructions.