摘要
介绍了用PLC改造旧设备时 ,根据继电器电路图设计梯形图的方法与步骤 。
This paper introduces the approach and method of design of PLC ladder diagram based on relay diagram in old equipment alteration, some problems in design are discussed.
出处
《电工技术杂志》
2001年第9期53-54,57,共3页
Electrotechnical Journal