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Fault diagnosis equipment and fault diagnosis method of multi-channel analog input and output circuit
Fault diagnosis equipment and fault diagnosis method of multi-channel analog input and output circuit
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机译:多通道模拟量输入输出电路的故障诊断设备及故障诊断方法
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摘要
PROBLEM TO BE SOLVED: To provide a device and method for diagnosis of a fault capable of simultaneously detecting the fault of a multiplexer used for a multi-channel analog input-output circuit and the fault of an A/D converter, and classifying the causes of the faults.;SOLUTION: A diagnosis voltage input unit inputs test voltage values different per channel of a multiplexer to the multiplexer having a plurality of channels configuring an analog signal conversion unit and to the A/D converter for converting the output of the multiplexer into a digital signal. Then, a digital voltage value output per channel is compared with the input test voltage value to determine whether a fault is in the multiplexer or the A/D converter on the basis of results of comparison.;COPYRIGHT: (C)2010,JPO&INPIT
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