In both general concrete plant equipment and mobile plant, the control system play a very important role in the whole set of equipment, coordinate the equipment running the parts work. The current majority of the electric control system of concrete mixing plant equipment use by industrial PC, work station and field control station based on PLC of three parts, can according to the predetermined formula of raw materials, automatic weighing, feeding, mixing and discharge.

Portable concrete plant equipment generally need to set up automatic and manual two kinds of control mode, manual work is mainly used in the system maintenance and software debugging, and commonly used in production process are often works automatically. Therefore, manual, automatic selection and corresponding buttons should be set, and indicator lights should be set for each button so that the system can be easily checked and wrong when it is abnormal. Automatic control can be used after the device is functioning properly.

The process of concrete from raw material to finished product is metering – conveying – feeding – stirring – material. Each link has a corresponding device component, which is centrally managed by the control system and displays the running state of each part on the computer screen of the control system. System logic control is mainly composed of PLC is responsible for, but to accept all kinds of switches, buttons and contactor state such as the input signal and the command of PC, realize the control of various actions, including the ingredients of instrument start-stop, motor start-stop control, the order of the chain control and protection control and so on.