Measurement-computing UL for NI LabVIEW Manuale Utente Scaricare il pdf (Pagina 39)

Universal Library Virtual Instruments (VIs) Analog Output VIs

AOutScFg.VI

Outputs the values to a range of D/A channels in the foreground.

Summary:

Inputs: BoardNum [U32] - The board number assigned when installed with InstaCal. Can

be 0 to 100.

LowChan [I32] - First D/A channel of scan.

HighChan [I32] - Last D/A channel of scan

Rate [I32] - Sample rate in scans per second [U32]

Range [I32] - D/A range code

Data Array [U16] - Data array to output D/A values from.

Simultaneous [TF] - Simultaneous update mode

ExtClock [TF] - Pace conversions externally

Outputs:

ErrCode [I32] -Error code. See ErrMsg.VI

Rate [I32] - Actual output rate in samples per second

Arguments:

BoardNum The board number associated with a board when it was installed with InstaCal. The

specified board must have a D/A.

LowChan First D/A channel of scan.

HighChan Last D/A channel of scan.

Low/High Channel #:The maximum allowable channel depends on which type of

D/A board is being used.

Rate (input) Sample rate in scans per second. For many D/A boards the Rate is ignored and can

be set to

NOTUSED. For D/A boards with trigger and transfer methods which allow

fast output rates, such as the CIO-DAC04/12-HS,

Rate should be set to the D/A

output rate (in scans/sec). This argument also returns the value of the actual rate

set. This value may be different from the user specified rate because of pacer

limitations.

If supported, scans are triggered at this rate. If you are updating four channels, 0-3,

specifying a rate of 10,000 scans per second (10 kS/s) will result in the D/A

converter rates of 10 kS/s: (one D/A per channel). The data transfer rate will be

40,000 words per second; (4 channels x 10,000 updates per scan).

The maximum update rate depends on the D/A board that is being used.

Range

(input) If the selected D/A 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 board. See the "

Range input values" 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.

DataArray

Must be in the range 0 – N, where N is the value 2

Resolution

- 1 of the converter.

There should be at least

HighChan-LowChan+1 elements in the array.

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 108 109

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Measurement-computing UL for NI LabVIEW Manuale Utente Pagina 39

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