National Instruments NI 784xR User Manual

Also see for NI 781xR: User manual User manual

Contents

National Instruments NI 784xR User Manual Manual pdf 12 page image

Chapter 1 IntroductionR Series Intelligent DAQ User Manual 1-2 ni.cominstrument (VI) to the FPGA. Using the FPGA Module, you cangraphically design the timing and functionality of the R Series device.If you only have LabVIEW but not the FPGA Module, you cannot createnew FPGA VIs, but you can create VIs that run on Windows or a LabVIEWReal-Time (RT) target to control existing FPGA VIs.Some applications require tasks such as real-time, floating-pointprocessing or datalogging while performing I/O and logic on the R Seriesdevice. You can use the LabVIEW Real-Time Module to perform theseadditional applications while communicating with and controlling theR Series device.The R Series device contains flash memory to store a startup VI forautomatic loading of the FPGA when the system is powered on.The NI 78xxR uses the Real-Time System Integration (RTSI) bus to easilysynchronize several measurement functions to a common trigger or timingevent. R Series PCI devices access the RTSI bus through a RTSI cableconnected between devices. R Series PXI devices access the RTSI busthrough the PXI trigger lines implemented on the PXI backplane.Refer to the NI R Series Intelligent DAQ Specifications, available atni.com/manuals, for detailed device specifications.Using PXI with CompactPCIUsing PXI-compatible products with standard CompactPCI products is animportant feature provided by PXI Hardware Specification Revision 2.1and PXI Software Specification Revision 2.1. If you use a PXI-compatibleplug-in card in a standard CompactPCI chassis, you cannot usePXI-specific functions, but you still can use the basic plug-in cardfunctions. For example, the RTSI bus on the R Series device is availablein a PXI chassis but not in a CompactPCI chassis.The CompactPCI specification permits vendors to develop sub-buses thatcoexist with the basic PCI interface on the CompactPCI bus. Compatibleoperation is not guaranteed between CompactPCI devices with differentsub-buses nor between CompactPCI devices with sub-buses and PXI.The standard implementation for CompactPCI does not include thesesub-buses. The R Series device works in any standard CompactPCI chassisadhering to the PICMG CompactPCI 2.0 R3.0 core specification.