在工業用途非常廣範,如半導體晶圓廠的各種自動化設備的控制 大樓電梯 機械停車設備 路邊的紅綠燈變換控制 自動化生產線
PLC的基本结构
PLC实质是一种专用于工业控制的计算机,其硬件结构基本上与微型计算机相同.
a. 中央处理单元(CPU)
中央处理单元(CPU)是PLC的控制中枢。它按照PLC系统程序赋予的功能接收并存储从编程器键入的用户程序和数据;检查电源、存储器、I/O以及警戒定时器的状态,并能诊断用户程序中的语法错误。当PLC投入运行时,首先它以扫描的方式接收现场各输入装置的状态和数据,并分别存入I/O映象区,然后从用户程序存储器中逐条读取用户程序,经过命令解释后按指令的规定执行逻辑或算数运算的结果送入I/O映象区或数据寄存器内。等所有的用户程序执行完毕之后,最后将I/O映象区的各输出状态或输出寄存器内的数据传送到相应的输出装置,如此循环运行,直到停止运行。
【公 司】: 福建鸿飞达自动化科技有限公司
【主 营】: AB(罗克韦尔)PLC全系列、ABB机器人系统备件、施耐德140/TSX、西门子6SN/6FC、伺服系统全套等
【价 格】: 电议
【发布人】: 程先生
【电 话】: 15306977024 13625073704
【所在地】: 福建 - 福州
【坐 机】: 0591-83532940
【Q Q】: 2851617309
【传 真】: 0591-88263940
【邮 箱】: 2851617309@qq.com
产品价格以电话或者QQ询价为准,发布价格不做参考,图片也一样
SIEMENS SIMODRIVE 611-A 6SN1121-0BA11-0AA1 NEW
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Siemens 6SN1118-0AA11-0AA1 Single Axis Card
SIEMENS SIMODRIVE 6SN1123-1AA00-0DA2 *USED*
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