P0902XA-OA
P0902XA-OA
P0902XA-OA
PLC的中央处理器(CPU 一般由控制器、运算器和寄存器组成,这些电路都集成在一个芯片内。CPU通过数据总线、地址总线和控制总线与存储单元、输入/输出接口电路相连接。
与一般的计算机一样,CPU是整个PLC的控制中枢,它按PLC中系统程序赋予的功能指挥PLC有条不紊的进行工作。CPU主要完成下述工作:
(1)接收、存储用户通过编程器等输入设备输入的程序和数据。
(2)用扫描的方式通过I/O部件接收现场信号的状态或数据,并存入输入映像寄存器或数据存储器中。
(3)诊断PLC内部电路的工作故障和编程中的语法错误等。
(4) PLC进入运行状态后,执行用户程序,完成各种数据的处理、传输和存储相应的内部控制信号,以完成用户指令规定的各种操作。
厦门泰尼电气有限公司
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BingHuYiLi,HaiCangDistrict,XiaMen city,China
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