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为什么不能选择通道8-15和通道25-32作为差分模式?



硬件: Multifunction DAQ (MIO)

问题: 在模拟采集设备上,我希望将所有通道设置为差分模式,但是对于通道8-15和通道25-32则不能选择,否则会报200077错误。

解答:

对于数据采集设备,当不支持的属性节点被配置时就会出现错误200077。比如,如果通道不支持差分输入属性,设置该通道为差分模式就会报错。

NI的数据采集设备一般都有16或者32个模拟输入通道。然而,一个差分测量通道需要两个通道进行。如果数据采集板卡有16个单端测量通道,则能够完成8个差分测量。这样,你只能选择通道0到通道7。

如果数据采集设备有32个模拟输入通道,可以使用16个通道作为差分测量通道。对于16个模拟输入通道,大多数数据采集设备都会有两个接线口。因此,为了使用所有的模拟输入通道,用户需要指定通道0至通道7,以及通道15至通道23作为差分通道。否则,选择通道0-15作为差分通道会产生错误200077。



相关链接: KnowledgeBase 3NAFKU9N: Error -200077 (0xFFFCF273) during Thermocouple Measurements with SCB-68 or SCXI
KnowledgeBase 3N52QD1J: Why do I Get Error -200077 with the Example Programs for Visual Basic 6.0 and DAQmx?
KnowledgeBase 3L2IASRM: Why am I Getting "Error -200077 occurred at an unidentified location" with Counter Tasks on USB-600X?
KnowledgeBase 3AACMSZH: Why am I Getting Error 200077 When Trying to Use a DAQ Assistant VI with LabVIEW 7.1 on my PXI-1010 Chassis?
KnowledgeBase 3CUF0E3F: Why Does DAQmxCfgDigEdgeRefTrig() Return error -200077?
KnowledgeBase 3O4D029N: Getting Error -200077 When Doing 1-sample Acquisition With DSA Boards (4472, 4461 etc.)

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报告日期: 01/06/2006
最近更新: 12/23/2012
文档编号: 3T5EF92W