描述
CPU是PLC的核心，起神经中枢的作用，每套PLC至少有一个CPU，它按PLC的系统程序赋予的功能接收并存贮用户程序和数据，用扫描的方式采集由现场输入装置送来的状态或数据，并存入规定的寄存器中，同时，诊断电源和PLC内部电路的工作状态和编程过程中的语法错误等。进入运行后，从用户程序存贮器中逐条读取指令，经分析后再按指令规定的任务产生相应的控制信号，去指挥有关的控制电路。
NetApp DS14MK4 with 14 X278A 15K 144GB drives.
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NetApp (14) X278A 15K 144GB DS14MK4
We buy your NetApp, EMC, IBM, SUN surplus.
NetApp 14 X278A 15K 144GB DS14MK4
We buy your NetApp, EMC, IBM, SUN surplus.
NetApp Hard drives 14 X278A 15K 144GB DS14MK4
We buy your NetApp, EMC, IBM, SUN surplus.
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NetApp X700B-ESH2-R5-C DS14MK2 SHLF ACPS 14x144GB
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NetApp X700AC DS14MK2 W/AC/PSU 14x144GB HD
NetApp FAS3020c iSCSI Filer Header
NetApp Network Appliance FAS960c Filer Unit System
NetApp SK-F810 Spares Kit for F810 Filer
NetApp X2044B FC-AL Card Dual Port Optical (SP-2044B)
