DAQmx Wait For Next Sample Clock
Waits until the next pulse of the Sample Clock occurs. If an extra Sample Clock pulse occurs between calls to this VI, the second call returns an error or warning and waits for the next Sample Clock pulse. Use the Convert Late Errors to Warnings DAQmx Real-Time property to specify whether this VI returns errors or warnings. If that property is TRUE, any warnings this VI returns do not include the source string.
Use this VI to ensure I/O cycles complete within Sample Clock periods. National Instruments recommends you use this VI for certain applications only.
Use the DAQmx Real-Time properties to configure error reporting and waiting options.
Place on the block diagram. |
Find on the Functions palette. |
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task/channels in is the name of the task or a list of virtual channels to which the operation applies. If you provide a list of virtual channels, NI-DAQmx creates a task automatically. | ||||||
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timeout (sec)specifies the maximum amount of time in seconds to wait for the next Sample Clock pulse. If the time elapses, this VI returns an error. The default timeout is 10 seconds. If you set timeout to -1, this VI waits indefinitely. | ||||||
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error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. If an error occurs while this VI or function runs, the VI or function runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
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task out is a reference to the task after this VI or function runs. If you wired a channel or list of channels to task/channels in, NI-DAQmx creates this task automatically. | ||||||
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is late? indicates if this VI detected an extra Sample Clock pulse after the specified number of warmup iterations execute. Use the Number of Warmup Iterations DAQmx Real Time property to specify the number of warmup iterations. This output is always FALSE until that number of loop iterations execute. | ||||||
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error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, error out describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
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