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From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
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當我在NI 6602 或 NI 6608 上同時使三個 Counter 輸入或在 PCI-6601 上使用多於一個 Counter 時, 每當多加一個 Counter Task 就會出現以下的錯誤訊息:
Error -200251 Measurements: No DMA channels or USB Bulk Endpoints are available
我該如何解決這個問題?
PXI-6602 與 PXI-6608 個只有三個 DMA 通道而 PCI-6601 只有一個 DMA 通道. 當 DMA 通道被占滿而使用者還想加更多工作時; 例如 Counter 輸入; 他就一定要使用 Interupt-Based 的通訊方式而不能再使用 DMA 了.
要如何把通訊方式調整成 Interupt-Based 請參考 KnowledgeBase 34FGAFVM: Configuring the Data Transfer Mechanism (Interrupts or DMA) in DAQmx and Traditional DAQ.
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