IS200EXHSG4A

要提高现场输入给PLC信号的可靠性，首先要选择可靠性较高的变送器和各种开关，防止各种原因引起传送信号线短路、断路或接触不良。其次在程序设计时增加数字滤波程序，增加输入信号的可信性。

    在现场输入触点后加一定时器，定时时间根据触点抖动情况和系统要的响应速度确定，一般在几十ms，这样可保证触点确实稳定闭合后，才有其它响应。模拟信号滤波可采用图2b程序设计方法，对现场模拟信号连续采样3次，采样间隔由A/D转换速度和该模拟信号变化速率决定。3次采样数据分别存放在数据寄存器DT10、DT11、DT12中，当***后1次采样结束后利用数据比较、数据交换指令、数据段比较指令去掉***大和***小值，保留中间值作为本次采样结果存放在数据寄存器DT0中。

Network Appliance NetApp X2017A HVD SCSI (SP-2017A)

NetApp X226A 72GB 10K ZCS Disk for FC9

NetApp X226B 72GB 10K ZCS Disk for FC9

NetApp X232A 72GB 10K BCS Disk for FC9

NetApp X232B 72GB 10K BCS Disk for FC9

NetApp X232 72GB 10K BCS Disk for FC9

NetApp X3183A 1GB for FAS270 Network Appliance - NEW

NetApp X3177A 256MB for C2100 Network Appliance - NEW

IBM EXN1000 NetApp X5612A-R5 106-00101 AT-FCX CONTROLLE
One-day shipping ***ailable

NetApp Network Appliance R150 Storage Disk
12x 250GB HDD Total of 2.7-TeraBytes Storage

NetApp X243A 72GB 10K Disk for F87

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
One-day shipping ***ailable

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