In electronic systems of modern machine tool the control way of circuits of keeping pressure is able to be completed by the relay - toucher and the PLC .

在现代机床电气系统中，保压回路的控制方式可以通过继电器& 接触器 控制和可编程控制器PLC实现。

This paper introduces how to use the toucher PLC the inverter to design the digital control spring machine control system introduces detailedly the principle of this system choice of the hardware the software realization .

介绍了用 触摸 屏、PLC、变频器设计数控弹簧机控制系统，详细地介绍了该机控制系统的工作原理，硬件的选型，软件的实现。