batching plant work flow: a concrete mixer control system startup into man machine dialogue interface, system initialization, including recipe, grade of concrete, slump, production amount. According to the sensor on each silo, the metering hopper detection, full signal output empty material or material, suggesting that operation personnel determine whether to start mixing control program. Start the sand, stone belt motor into the expected aggregate weighing hopper; open the fly ash, cement silo butterfly valve, start the motor of screw conveyor conveying fly ash and cement to powder weighing bucket; open water pump and the admixture of additives and water flows into a measuring bucket. Metering meet the requirements of the measurement after the bucket Doumen, ingredients into the mixer, stirring, to set the time to open the concrete mixer door, concrete into the concrete mixer truck.