描述
在工业生产过程当中，存在一些如温度、压力、流量、液位和速度等连续变化的量（即模拟量），PLC采用相应的A/D和D/A转换模块及各种各样的控制算法程序来处理模拟量，完成闭环控制。PID调节是一般闭环控制系统中用得较多的一种调节方法。过程控制在冶金、化工、热处理、锅炉控制等场合有非常广泛的应用。
NetApp 300GB 15K Hard Disk 108-00156 For Net App DS14
NetApp X279A-R5 300GB 15K DS14MK4 Net App 108-00156
NetApp X279 A R5 300GB 15K RPM HDD DS14 mk4 & DS14 mk2
NetApp 108-00156 300GB 15K RPM Disk for DS14MK4 MK4
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Qlogic QLA2200G NetApp X2040B FC-AL 64Bit Copper
NetApp X233A 108-02085 18GB 10k RPM FC Disk Drive DS14
NetApp X2031A 1M FC Copper Cable w/ DB9-DB9 Connector
NetApp X268A-R5 1465018092 512B/SECT 750GB 7.2K SATA
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NetApp X268A-R5 DSK DRV, 750GB, 7200 RPM, SATA, A, R5
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NetApp X223A 9GB 10K ZCS Disk for FC9 Network Appliance
