论文部分内容阅读
近几年,日本的欧姆龙、富士、三菱、东芝,德国西门子的S7可编程序控制器PLC大量供应国内市场。由于其特有的高性能,高可靠性,易维护等优点,目前已广泛用于机械工业中的各个行业。 PLC从整体来看,分为独立型与数控系统使用的内藏式PLC。 独立型PLC常见用于自动控制加工生产流水线,数控机床等行业,有的带有RS232或RS422通讯接口,可直接与计算机、工控机相连接,有的通过工业总线PROFIBUS-DP接口实现工业联网,有的与变频器、伺服电动机相连结,实现位置控制,
In recent years, Japan’s Omron, Fujitsu, Mitsubishi, Toshiba, Germany’s Siemens PLC PLC large supply of the domestic market. Because of its unique high performance, high reliability, easy maintenance, etc., has been widely used in various industries in the machinery industry. PLC from the overall point of view, is divided into independent and CNC system built-in PLC. Independent PLC is commonly used for automatic control of production lines, CNC machine tools and other industries, and some with RS232 or RS422 communication interface, can be directly connected with the computer, IPC, and some through the industrial bus PROFIBUS-DP interface to achieve industrial networking, Some with the inverter, servo motor connected to achieve position control,