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本文简单介绍了真空包装机的工作原理及气动系统,提出了对其控制系统进行可编程控制器(PLC)改造,重点阐述了PLC控制系统的软硬件结构,具体给出了PLC的I/O分配及外部接线图及控制梯形图。
In this paper, the working principle and pneumatic system of vacuum packaging machine are briefly introduced, and the PLC (Programmable Logic Controller) transformation of its control system is put forward. The hardware and software structure of PLC control system is emphatically described. The PLC I / O Distribution and external wiring diagram and control ladder.