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Chapter 2
Function Reference — DAQ_Clear
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National Instruments Corporation
2-117
NI-DAQ FRM for PC Compatibles
DAQ_Clear
Format
status = DAQ_Clear (deviceNumber)
Purpose
Cancels the current DAQ operation (both single-channel and multiple-channel scanned) and
reinitializes the DAQ circuitry.
reinitializes the DAQ circuitry.
Parameters
Input
Using This Function
DAQ_Clear
turns off any current DAQ operation (both single-channel and multiple-channel),
cancels the background process that is handling the data acquisition, and clears any error flags
set as a result of the data acquisition. NI-DAQ then reinitializes the DAQ circuitry so that
NI-DAQ can start another data acquisition.
set as a result of the data acquisition. NI-DAQ then reinitializes the DAQ circuitry so that
NI-DAQ can start another data acquisition.
Note
If your application calls
DAQ_Start
,
SCAN_Start
, or
Lab_ISCAN_Start
,
always make sure that you call
DAQ_Clear
before your application terminates and
returns control to the operating system. Unpredictable behavior can result unless
you make this call (either directly, or indirectly through
you make this call (either directly, or indirectly through
DAQ_Check
,
Lab_ISCAN_Check
, or
DAQ_DB_Transfer
).
Name
Type
Description
deviceNumber
i16
assigned by configuration utility