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Fetch (G Dataflow)

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    Last Modified: September 27, 2017

    Transfers acquired waveform data from device memory to PC memory. This data was previously written to onboard memory by the hardware after the hardware was initiated.

    If the number of samples specified in samples to read is not available after the time duration specified in max time milliseconds, this node returns no data with a timeout error. The fetch position can be modified by selecting the appropriate Fetch Relative To and Fetch Offset properties in the node. The default Fetch Relative To value is Current Read Position. The default Fetch Offset value is 0. The Fetch Waveform node is not necessary if you use the node, as the fetch is performed as part of that function.

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    Fetches an array of data using the waveform data type and returns an array of waveforms, one for each element in the channel list array.
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    Fetches the data as a two-dimensional array of unsigned 32-bit integers and returns the number of samples read.
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    Fetches the data as a two-dimensional array of unsigned 16-bit integers and returns the number of samples read.
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    Fetches the data as a two-dimensional array of unsigned 8-bit integers and returns the number of samples read.
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    Fetches the data from the subset of channels listed in the channel list parameter as an array of waveform data type data and returns the number of samples read.
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    Fetches the data as an array of unsigned 32-bit integers and returns the number of samples read.
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    Fetches the data as an array of unsigned 16-bit integers and returns the number of samples read.
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    Fetches the data as an array of unsigned 8-bit integers and returns the number of samples read.
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    Transfers acquired waveform data from device memory directly to PC memory allocated by a Direct DMA-compatible device.
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    Fetches the data from the subset of channels listed in the channel list parameter using the waveform data type and returns the number of samples read.

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