描述
PLC中的CPU与存储器配合，完成控制功能。它与DCS系统处理温度、压力、流量等参数的系统不同，采用快速的巡回扫描周期，一般为0.1~0.2s，更快的则选用50ms或更小的扫描周期。它是一个数字采样控制系统。
National Instruments PCI-MIO-16E-4 PCI-6040E DAQ Board
National Instruments PCI-GPIB PCI 183617G-01
NATIONAL INSTRUMENTS N114
National Instruments PCIStep 184903B-12
NATIONAL INSTRUMENTS 179193-20 NATIONAL INST. INTERFACE
National Instruments AT-MXI Card
NATIONAL INSTRUMENTS MXi-2 DATA CABLE
National Instruments SCB-68 with enclosure 182469E-01L
National Instruments VME-MXI Assy 180960-01 w/ 4m Cable
National Instruments NI GPIB-VXI/C VXIbus C
