PC-414

®®

DATEL, Inc., Mansfield, MA 02048 (USA)

• Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 • Email: sales@datel.com • Internet: www.datel.com

All VI’s are assembled graphically using a mouse and can be

edited at any time to modify functionality or appearance. Non-

stop, seamless data acquisition continues on the PC-414

while LabVIEW simultaneously maintains the GUI and

handles the A/D data stream in real time. Easily customized,

interactive user interfaces can be created from the vast library

of front panel controls and displays offered by LabVIEW.

The PC-414LV includes extensive Dynamic Linked Library

(DLL) functions that perform the PC-414 low level hardware

control and monitor operations transparently. The software

provides VI functions that poll PC-414 status flags

independent of, and simultaneous with, data acquisition and

data transfer. Control is retained by the user as long as

LabVIEW continues to execute correctly. The multi-window,

visual programming environment facilitates building and

accessing hierarchical VI programs. Multi-tasking allows

context switches to other concurrent Windows applications

without disrupting PC-414 operation or control.

The PC-414/LabVIEW system optimizes two concurrent

processes - the PC-414 acquiring data while LabVIEW further

processes or stores the uploaded data stream. The entire

PC-414/LabVIEW combination uses only a few VI functions

that are easy to understand and incorporate into a “block

diagram” program. The basic concept is to initialize the

PC-414 hardware, reset the FIFO memory, start data

acquisition, and upload blocks of data from the FIFO to

LabVIEW memory buffers on the host - or to remote receivers

over the DT Connect I compatible output port. These data

blocks can then be further processed as screen displays,

indicators, graphs, sent to printers or plotters, or simply

archived to disk file for later analysis. The A/D continues

running and no data will be lost as long as LabVIEW uploads

the A/D data faster than the data is being acquired.

Virtual Instrument Library

In summary, PC-414LV includes the following VI functions:

PC-414 Initialize

Initialize the PC-414 hardware - board

model, I/O base address, etc.

Operating Mode

Specify A/D trigger rate, A/D sample

rate, and analog input channel.

Clear FIFO

Reset the FIFO memory

Start/Stop A/D

Enable and disable the A/D.

Read Status

Read hardware status flags - FIFO

flags, acquisition done, oversampling.

Read FIFO

Read blocks of A/D data from the

FIFO on the PC-414 and fill a

LabVIEW buffer on the host.

Write DAC

Update the analog output channel.

Inport/Outport

Read/write the 8-bit digital I/O port.

PC-414 Demo

Complete data acquisition

demonstration VI, includes real time

signal display.

Demultiplex Buffers

Unravel a multi-channel data buffer

and extract data from one channel

only.

Figure 7. PC-414LV Visual Program

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