摘要
本文通过对交流双速电梯电气控制特点的分析，提出了采用ＰＬＣ进行改造的方案，并介绍了部分控制电路的ＰＬＣ控制的程序设计，以及编制程序时对一些特殊问题的处理方法。
In the paper an improved control scheme of A,C。double speed lifterwith the programmad logic controller is proposed through analyzing thecharacteristics of it.The desing of a part of the programmed logic controller and the method treating sone specific problems in the program are introduced.
