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介绍了用S5—115U可编程序控制器（PLC）对三曲轴双边滚切剪移动机架进行控制的整个过程，并对机架开口度的控制给出计算公式及硬件电路设计、软件流程图。
The whole process of controlling the triaxial crankshaft scissor shear frame with S5-115U programmable logic controller (PLC) is introduced, and the calculation formula and hardware circuit design of the opening degree of the frame are given. The software flow chart .