1794-IRT8通用电气

供应1794-IRT8通用电气模块
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1794-IRT8模块即“PC+运动控制器”的模式。这样的运动控制器具有信息处理能力强，开放程度高，运动轨迹控制准确，通用性好的特点。但是这种方式存在以下缺点：运动控制卡需要插入计算机主板的PCI或者ISA插槽，因此每个具体应用都必须配置一台PC机作为上位机。这无疑对设备的体积、成本和运行环境都有一定的限制，难以独立运行和小型化。
微型
微控制器（MicroController）又可简称MCU或μC，也有人称为单芯片微控制器（Single Chip Microcontroller），将ROM、RAM、CPU、I/O集合在同一个芯片中,为不同的应用场合做不同组合控制。微控制器在经过这几年不断地研究、发展，历经4位、8位，到如今的16位及32位，甚至64位。产品的成熟度，以及投入厂商之多、应用范围之广，真可谓之空前。在国外大厂因开发较早、产品线广，所以技术 ，而本土厂商则以多功能为产品导向取胜。
基本功能编辑
数据缓冲：由于I/O设备的速率较低而CPU和内存的速率却很高，故在控制器中必须设置一缓冲器。在输出时，用此缓冲器暂存由主机高速传来的数据，然后才以I/O设备所具有的速率将缓冲器中的数据传送给I/O设备；在输入时，缓冲器则用于暂存从I/O设备送来的数据，待接收到一批数据后，再将缓冲器中的数据高速地传送给主机。
差错控制：设备控制器还兼管对由I/O设备传送来的数据进行差错检测。若发现传送中出现了错误，通常是将差错检测码置位，并向 CPU报告，于是CPU将本次传送来的数据作废，并重新进行一次传送。这样便可保证数据输入的正确性。

数据交换：这是指实现CPU与控制器之间、控制器与设备之间的数据交换。对于前者，是通过数据总线，由CPU并行地把数据写入控制器，或从控制器中并行地读出数据；对于后者，是设备将数据输入到控制器，或从控制器传送给设备。为此，在控制器中须设置数据寄存器。

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