1785-L40B
1785-L40B
1785-L40B
1. 梯形图梯形图(LD——Ladder Diagram)法编程与传统的继电器电路图
2. 的设计很相似,用电路元件符号来表示控制任务直观易理解。
3. 语句表语句表也称指令表(IL—Instruction List)。或叫指令表语言。它是以RD、OR、AND、NOT……等逻辑指令为语句的操作码,以操作地址或参数操作数的编程语言。操作码表示要操作的功能类型,操作数表示到去操作。这种编程方法紧凑、系统化,但比较抽象,有时先用梯形图表达,然后写成相应的指令语句输入。 梯形图与语句表的关系
4. 高级语言编程法(如C语言等);随着数控技术的发展,可编程控制器控制的设备已由单机扩展到FMS、CIMS等。可编程控制器处理的信息除开关量信号、模拟量信号、交流信号外,还需要完成与上位机或下位机的信息交换。某些信息的处理已不能采用顺序执行的方式,而必须采用高速实时处理方式。基于这些原因,计算机所用的高级语言便逐步被引用到PC的应用程序中来。
5. 其他编程法控制系统流程图(逻辑功能图) 编程法;功能模块图表示的“功能块语言”编程法;基于图形表示的“图形语言”编程法;用子程序控制和指令语句表示的“结构文本语言”编程法;逻辑式编程法。
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