SGMG-13AWA-YR13
50C70-495-91
程序：PLC指令的有序集合，PLC运行它，可进行相应的工作，当然，这里的程序是指PLC的用户程序。用户程序一般由用户设计，PLC的厂家或代销商不提供。用语句表达的程序不大直观，可读性差，特别是较复杂的程序，更难读，所以多数程序用梯形图表达。  
梯形图：梯形图是通过连线把PLC指令的梯形图符号连接在一起的连通图，用以表达所使用的PLC指令及其前后顺序，它与电气原理图很相似。它的连线有两种：一为母线，另一为内部横竖线。内部横竖线把一个个梯形图符号指令连成一个指令组，这个指令组一般总是从装载（LD）指令开始，必要时再继以若干个输入指令（含LD指令），以建立逻辑条件。最后为输出类指令，实现输出控制，或为数据控制、流程控制、通讯处理、监控工作等指令，以进行相应的工作。母线是用来连接指令组的。下图是三菱公司的FX2N系列产品的最简单的梯形图例、、
联系人：李工销售工程师
联系电话：0591-62182520      13696852881
联系QQ：1273632994
公司传真：0591-62032566
公司全称：
福州卓凯电子科技有限公司
公司地址：
福建省福州市闽侯西江滨大道77号正荣润园1号楼1205室
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