描述
计数器是PLC重要内部部件,它是在执行扫描操作时对内部元件X、Y、M、S、T、C的信号进行计数。当计数达到设定值时,计数器触点动作。计数器的动合、动断触点可以无限使用。其详细介绍参照项目八
可编程控制器用于模拟量控制、位置控制、数据I/O时,需要许多数据寄存器存储参数及工作数据。这类寄存器的数量随着机型不同而不同。
每个数据寄存器都是16位,其中最高位为符号位,可以用两个数据寄存器合并起来存放32位数据(最高位为符号位)。
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