4/11/2023 0 Comments Ni componentworks datagraph![]() (see the NI-DAQmx C Reference Help for more The DAQmxRegisterEveryNSamplesEvent registers a callbackįunction to receive an event when the specified number of samples is writtenįrom the device to the buffer or from the buffer to the device. It returns the number of samples which I also know what I am expecting.thanks for any help,Public Function EveryNSamplesEventHandler(ByVal taskhandle As Long, ByVal eventType As Long, ByVal numSamples As Long, ByVal callbackData As Long) As Long Dim numRead As Long Dim acqtype As Integer DAQm圎rrChk (DAQmxGetTaskNumChans(taskhandle, numChannels)) DAQm圎rrChk (DAQmxReadBinaryI16(taskhandle, numSamples, 10, DAQmx_Val_GroupByScanNumber, dataBuffer(0), numChannels * numSamples, numRead, ByVal 0)) Like I said I grabbed this from a sample but as I closely exam this I already know the value of numchannels so I don't think I need this function.I guess while I am asking I have the same question about the DAQmxGetTaskNumChans function when I am configuring my channels. Understand when my Read function actually happens.Ĭreate taskconfigure analog channelsstart taskwait for EveryNSamplesEventHandler to executeAlso do I need to use the DAQmxGetTaskNumChans before my READ function. I place my own codeĪfter my Read function and everything is working but I just don't Thinking that EveryNSamplesEventHandler fires after my acq hasĬompleted. My question is when does my DAQmxReadBinaryI16 function execute. I am writing up a manual that explains my code. I found NI code samples that are working for me however I am not sure I understand in what order they are being executed. VXI-AO-48XDC Obsolete Status has been announced by National Instruments, but the module will still be available for purchase and repairs by Apex Waves.I have a working app that uses VB6 with NIDAQmx. The digital I/O connector of the VXI-AO-48XDC is a standard 96-pin DIN header connector. Custom cabling can also be designed by the user, enabling you to have a wide range of test instruments interface, I/O modules with racks, and any parallel interface device. National Instruments offers various compatible accessories for the VXI-AO-48XDC module, including cables with cable assemblies and connector blocks. LabWindows has a state-of-the-art user interface and ANSI-standard C programming language is widely used language in this software. LabVIEW is a user-friendly interactive software platform for the VXI-AO-48XDC with powerful graphical programming. ComponentWorks is a high-level programming interface software for providing virtual instruments through OLE and DLLs and provide resource management utilities, as well as interactive control utilities with this DC Setpoint Module. The VXI-AO-48XDC is highly compatible with software like LabVIEW, ComponentWorks, NI-VISA, VirtualBench, LabWindows, and NI-DAQ. The VXI-AO-48XDC module is widely used in experimental stimulated signaling, generating analog functions, and interfacing with electromechanical relays, LEDs, optical isolations, solid state relays, and I/O modules. The VXI-AO-48XDC has 48 voltage and current input channels and 32 digital I/O lines, which can be used in various DC setpoint and digital applications. The VXI-AO-48XDC is a module for VXI bus that converts the VXI bus system into a digital I/O system for different types of testing, including equipment testing, protection testing, laboratory equipment testing, and industrial process monitoring. The NI VXI-AO-48XDC is designed by National Instruments. The VX-AO-48XDC (Part Number: 777417-01) is a DC Setpoint Module. National Instruments VXI-AO-48XDC DC Setpoint Module
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