【摘要】 该文介绍了用PLC改造旧设备时,根据原继电器电路图设计梯形图的方法与步骤,并针对具体应用中存在的问题,给出了解决方法及注意事项。更多还原

【Abstract】 This paper presents the design method of a ladder-type chart according to an original relay circuit when the old equipment is upgraded with PLC,and points out the problem in the concrete applications,solutions and necessary points for attention.更多还原