Measurement Computing ADAC-LVi - Manual (Page 21)

Chapter 2 Easy Analog Input VIs
ADAC LabVIEW VI 15
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Board ID (0) Specifies the ADAC-LVi board ID number to be used in this acquisition.
The ID numbers are defined in the configuration file ADAC-LVi.con located in the
Windows main directory.
Channel (0(1)) Channel is a string that specifies the analog input channel number to
acquire data from. Channel is typically set to acquire only a single channel of data but
may be used to collect multiple channels into its 1 dimensional array. See the ADAC AI
Acquire Waveforms VI for multi channel acquisition with a two dimensional array.
For boards that support input gain the channel list also specifies a separate gain value for
each channel. Gains are specified in parentheses after the channel number. For example,
"0(1),1(8),2(4)" is interpreted as channel 0 at a gain of 1, channel 1 at a gain of 8 and
channel 2 at a gain of 4.
Number of Samples (1000) Number of samples is the total number of data samples the
VI acquires before the acquisition completes. The default value is 1000 samples.
Sample Rate (Hertz:1000) Sample Rate is the total number of samples per second the
VI acquires from the specified channel(s). The default value is 1000.00 samples per
second.
Iteration (init:0) Iteration controls when the ADAC-LVi device subsystem allocation
and device initialization is performed. If iteration is 0, the VI allocates the device and
initializes it with the hardware specifications connected to the VI. The VI then starts the
acquisition and reads the data. If iteration is greater than zero, then VI assumes that the
current configuration is valid and starts the acquisition, then reads the data.
Clear Acquisition (true) Clear acquisition determines whether the VI releases the device
after reading the specified number of samples. The VI should pass a TRUE to this
parameter when reading the last set of samples for a given acquisition. The default is
TRUE, which means that the VI reads data only once if this input remains unwired. You
typically wire this input to the terminating condition of a loop, so that when the loop
finishes the device is released.
error in (no error) error in describes error conditions occurring before this VI executes.
This cluster defaults to no error.
Waveform Waveform is a one-dimensional array containing the scaled analog input data
for the specified channels in volts.
error out error out contains error information. If the error in cluster indicated an error,
the error out cluster contains the same information. Otherwise, error out describes the
error status of this VI.