产品详情
R65GMNA-TS-NS-N?V-00
①.可编程逻辑控制器实质是一种于工业控制的计算机, 可编程逻辑控制器其硬件结构基本上与微型计算机相同,基本构成:电源、*处理单元(CPU) 、存储器、输入输出接口电路、功能模块、通信模块。
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②.当可编程逻辑控制器投入运行后,其工作过程一般分为三个阶段,即输入采样、用户程序执行和输出刷新三个阶段。完成上述三个阶段称作一个扫描周期。在整个运行期间,可编程逻辑控制器的CPU以一定的扫描速度重复执行上述三个阶段。
③.可编程逻辑控制器具有以下鲜明的特点。使用方便,编程简单,功能强,性能价格比高,硬件配套齐全,用户使用方便,适应性强,可靠性高,抗*力强,系统的设计、安装、调试工作量少,维修工作量小,维修方便
④.可编程逻辑控制器起源:1968年美国通用汽车公司提出取代继电器控制装置的要求;
1969 年,美国数字设备公司研制出了*台可编程逻辑控制器PDP—14 ,在美国通用汽车公司的生产线上试用成功,*采用程序化的手段应用于电气控制,这是*代可编程逻辑控制器,称Programmable Logic Controller,简称PLC,是*的*台PLC。
1969年,美国研制出世界*台PDP-14;
1971年,日本研制出*台DCS-8;
1973年,德国西门子公司(SIEMENS)研制出欧洲*台PLC,型号为SIMATIC S4;
1974年,中国研制出*台PLC,1977年开始工业应用。
⑤.可编程逻辑控制器主要应用领域:
1、《DCS集散控制系统》
2、《FCS控制系统》
3、《PLC可编程控制系统》
4、《HMI人机界面监控系统》
5、《各类风机水泵变频控制系统》
6、《无线遥测、遥控控制系统》
OCD-D2B1B-1212-C100-OCC
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