描述
如果控制对象的各重要控制环节，都用这样一些看门狗”看”着，那系统的工作将了如指掌，出现了问题，卡在什么环节上也很好查找。
还有其它一些监控工作可做。对一个复杂的控制系统，特别是自动控制系统，监控以至进一步能自诊断是非常必要的。它可减少系统的故障，出了故障也好查找，可提高累计平均无故障运行时间，降低故障修复时间，提高系统的可靠性。
National Instruments GPIB-1014 VMEbus Interface, New
National Instruments PCI-4552
National Instruments GPIB-USB-HS IEEE 488.2
National Instruments NI GPIB-USB-HS GPIB Controller
Brand new in box. Never opened.
Expedited shipping available
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National Instruments NI PCI-MIO-16XE-50 183454E-01 Card
National Instruments NI PCI-MIO-16XE-50 183454B-01 Card
National Instruments Pulse Generator FP-PG-522
Expedited shipping available
National Instruments PCI-6031E Data Acquisition Card
National Instruments nuDrive Motion Controller 4-Axis
NEW!!! NATIONAL INSTRUMENTS NI PCI-GPIB 183617K-01
National Instruments nuDrive 4-Axis Servo Amplifier
National Instruments Extender Card VXI-MXI-2
