Table Of Contents

DAQmx Read (Analog » Waveform » Time) (G Dataflow)

Last Modified: July 19, 2019

Reads one or more waveforms from a task that contains one or more analog input channels. You must specify the duration, in seconds, for the waveform.


task in

task in is the name of the task that the operation applies.


error in

error in describes error conditions that occur before this node runs. This input provides standard error in functionality.



duration specifies the amount of time in seconds to read samples.



timeout specifies the amount of time in seconds to wait for samples to become available. If the time elapses, the node returns an error and any samples read before the timeout elapsed. The default timeout is 10 seconds. If you set timeout to -1, the node waits indefinitely.

If you set timeout to 0, the node tries once to read the requested samples and returns an error if it is unable to.


task out

task out is a reference to the task after this node runs.


error out

error out contains error information. This output provides standard error out functionality.



data returns a 1D array of waveforms. Each element of the array corresponds to a channel in the task. The order of the channels in the array corresponds to the order in which you add the channels to the task or to the order of the channels you specify with the Channels to Read property. NI-DAQmx scales the data to the units of the measurement.

Where This Node Can Run:

Desktop OS: Windows

FPGA: LabVIEW NXG does not support FPGA devices

Web Server: Not supported in VIs that run in a web application

Recently Viewed Topics