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The process of optimizing parameters on controller depends on effective communication mode on precision aluminum operations control system.The parameters of controller need to be modified by many times. In order to symplify the debugging process, shorten debugging period, this paper designs an wireless system which has graphical interface to control and maintenance the operating system. This system is geared to the need of S7-200PLC which is used in the system, and Modbus protocol in the wireless way. Through the PLC parameters like the upper and lower limit of weigh, the judgment of produced aluminum weight calculation deviation, the upper and lower limit of closing wind and abnormal closing wind compensation dosage to make status adjustment, realize the debugging and maintenance to the system control part. As the result of spot test shows, this handled equipment has good reliability and practicality. It reduce the power consumption of the system effectively while the precise control of aluminum.