摘要：介绍了以PLC为核心的金属印铁设备控制系统。主要包括控制系统硬件部分的构成和软件编程。着重介绍了以PLC、旋转编码器等电气元件代替复杂的继电器电路实现自动化控制的方法，讨论如何使用PLC内部丰富的功能指令进行同步运转控制，为相关企业实现印铁设备改造提供了一个经济实用的解决方案。
关键字：可编程控制器，印铁设备，同步运转

Abstract：This paper introduces the control method of PLC in sheet iron presswork, including the design of hardware and software, which PLC and other components to replace relay circuit and realize the auto-control. We analyze how to use Function Instruction of PLC to control the Position in-phase, and provide a practical scheme for enterprise to refit old equipment.
Keywords：PLC, equipment of sheet iron presswork, running in-phase