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National Instruments PXI-7831R Where To Start

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Where to Start with the NI PXI-7831R
If you have LabVIEW and not the LabVIEW FPGA module, you cannot create new
Note
FPGA VIs. You can only create VIs that run in LabVIEW to control existing FPGA VIs.
LabVIEW™, National Instruments™, NI™, ni.com™, and NI-VISA™ are trademarks of National Instruments Corporation.
Product and company names mentioned herein are trademarks or trade names of their respective companies. For patents
covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the
patents.txt file on your CD, or ni.com/patents.
ni.com
© 2003 National Instruments Corp. All rights reserved.
Thank you for purchasing a National Instruments PXI-7831R. This
document explains how to set up the hardware system and use the
NI PXI-7831R. This reconfigurable I/O (RIO) device has 96 digital I/O
(DIO) lines, eight independent, 16-bit analog output (AO) channels, and
eight independent, 16-bit analog input (AI) channels.
A user-reconfigurable field-programmable gate array (FPGA) controls the
digital and analog I/O on the NI PXI-7831R. The FPGA on the RIO device
allows you to define the functionality and timing of the device, whereas
traditional multifunction I/O (MIO) devices have a fixed functionality
provided by an application-specific integrated circuit (ASIC). You can
change the functionality of the FPGA on the RIO device by using
LabVIEW, a graphical programming environment, and the LabVIEW
FPGA module to create and download a custom virtual instrument (VI) to
the FPGA. You can reconfigure the RIO device with a new VI at any time.
Using LabVIEW, you can graphically design the timing and functionality
of the RIO device without having to learn the low-level programming
language or hardware description language (HDL) that is traditionally used
for FPGA design.
Some applications require tasks such as real-time, floating-point
processing or data logging while performing I/O and logic on the RIO
device. You can use the LabVIEW Real-Time Module to perform these
additional applications while also communicating with and controlling the
RIO device.
The RIO device contains flash memory to store VIs for instant loading of
the FPGA when the system is powered on.
April 2003
323256A-01

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Summary of Contents for National Instruments PXI-7831R

  • Page 1 16-bit analog input (AI) channels. A user-reconfigurable field-programmable gate array (FPGA) controls the digital and analog I/O on the NI PXI-7831R. The FPGA on the RIO device allows you to define the functionality and timing of the device, whereas traditional multifunction I/O (MIO) devices have a fixed functionality provided by an application-specific integrated circuit (ASIC).

  • Page 2: What You Need To Get Started

    This section contains two lists that detail what you need to get started using the NI PXI-7831R with the LabVIEW Real-Time Module or with Windows 2000/XP. Getting Started with Windows 2000/XP To set up and use the NI PXI-7831R with Windows 2000/XP, you need the following items: ❑ NI PXI-7831R ❑...

  • Page 3: Installing The Software

    Release Notes document for software installation instructions. Note NI recommends that you install LabVIEW 7.0 or later before installing the NI Device Drivers software. For LabVIEW installation instructions, refer to the LabVIEW Release Notes document. © National Instruments Corporation Where to Start with the NI PXI-7831R...
  • Page 4 Notify NI if the devices appear damaged in any way. Do not install damaged devices into the computer. Store the NI PXI-7831R in the antistatic envelope when not in use. Where to Start with the NI PXI-7831R...

  • Page 5: Installing The Hardware

    Installing the Hardware You can install the NI PXI-7831R in any available PXI slot in the PXI/CompactPCI chassis. The following are general installation instructions, so consult the computer user manual or technical reference manual for specific instructions and warnings. Note You must install the software before installing the hardware.

  • Page 6: Connecting Signals

    Connecting Signals The NI PXI-7831R has two DIO connectors with 40 DIO lines per DIO connector, and one MIO connector with eight AI lines, eight AO lines, and 16 DIO lines. Figure 1 shows the I/O connector locations for the NI PXI-7831R. The I/O connectors are numbered starting at zero.

  • Page 7: Connecting I/O Signals

    SCB-68, you should use the SH68-C68-S cable. Plug the small VHDCI connector end of the SH68-C68-S shielded cable into the appropriate I/O connector on the NI PXI-7831R, and connect the other end of the SH68-C68-S cable into the terminal block.

  • Page 8: Getting Started Example

    Connections that exceed any of the maximum ratings of input or output signals on the NI PXI-7831R can damage the NI PXI-7831R and the computer. Refer to the NI PXI-7831R User Manual for the maximum input ratings for each signal. NI is not liable for any damage resulting from such signal connections.
  • Page 9 Some users might see a Downloading dialog box briefly appear to display the progress of the FPGA VI as it downloads to the FPGA on the NI PXI-7831R. This dialog box only appears if the FPGA VI is not already downloaded to the FPGA.

  • Page 10: Where To Go From Here

    PXI-7831R. A reference to this VI running on the FPGA is passed to the subsequent nodes on the block diagram. These nodes can interact with the VI running on the FPGA by reading and writing its indicators and controls to control the execution of the FPGA VI. After the While...

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