当我创建计数器任务时得到错误-200431？
硬件: Multifunction DAQ (MIO)
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问题: 我使用M系列板卡和DAQmx创建计数器任务，得到如下错误：
Error -200431 occurred at DAQmx Create Channel
Possible reason(s): Selected physical channel does not support the measurement type required by the virtual channel you are creating.
Create a channel of a measurement type that is supported by the physical channel, or select a physical channel that supports the measurement type.
为了使用该任务，我该创建什么通道呢？解答:
在DAQmx 9.0及以后的版本中，三种计数器任务仅被X系列和cDAQ系列板卡支持。如果你试图在不支持的硬件上创建这些任务，你将得到上述错误。
上述提及的三种计数器任务具体如下表所示：
| Task Type | Paired Measurement |
| CI Pulse Freq | Frequency and Duty Cycle |
| CI Pulse Time | High-Time Low-Time |
| CI Pulse Ticks | High Ticks Low Ticks |
这些任务与被大多数M系列板卡支持的半周期计数器测量任务类似。
相关链接: Developer Zone Community: Measure Duty Cycle - Buffered - Finite
Developer Zone Tutorial: Pulse Width Modulation (PWM) Using NI-DAQmx and LabVIEW
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报告日期: 08/12/2010
最近更新: 08/02/2013
文档编号: 5CB9QT9K