Measurement Computing UL for NI LabVIEW - Manual (Page 84)

Universal Library Virtual Instruments (VIs) Streamer File VIs
Range If the selected A/D board does not have a programmable range feature, then this
argument will be ignored. Otherwise the gain can be set to any of the ranges that
are supported by the selected A/D board. See the "
Range input values" table on
page 19 for valid values. Refer to board-specific information contained in the
Universal Library User's Guide (available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf ) for the list of ranges
supported by each board.
FileName Name of the streamer file to create.
Use FileRead.VI to read the data from this file.
Refer to the Universal Library User's Guide (available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf ) for information on the
streamer file functions.
ExtClock If this option is used, then conversions will be controlled by the signal on the
external clock input line rather than by the internal pacer clock. Each conversion
will be triggered on the appropriate edge of the external clock input signal (see
board-specific information). When this option is used, the
Rate argument is
ignored. The sampling rate is dependent on the trigger signal.
DTConnect If True, samples are sent to the DT-Connect port if the board is equipped with one.
If False, samples are not output to the DT-Connect port. This is the default.
ExtTrigger Wait until trigger input line is asserted. When set to True, the sampling will not
begin until the trigger condition is met.
Rate (output) Actual update rate in samples per second.
ErrCode Error code returned from the Universal Library. Zero if no error occurred. Use the
ErrMsg VI to convert ErrCode into a readable string.
Notes:
OVERRUN Error: This error indicates that the data was not written to the file as fast as the data was sampled.
Consequently, some data was lost. The value returned from FileInfo.VI in Count will be the number of points
that were successfully collected.
Important - Read board-specific information in UL User's Guide
In order to understand the functions, read the board-specific information contained in the Universal Library
User's Guide (available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf ). The
example programs should be examined and run prior to attempting any programming of your own.
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