Download NI-DAQmx The Latest in Measurement Services Software NI-DAQmx driver software goes far beyond a basic DAQ driver to deliver increased productivity and performance and is one of the main reasons National Instruments continues to be the leader in virtual instrumentation and PC-based data acquisition. Hello, I am using the NI PCI 6225 M series DAQ board with NIDAQmx 7.4 driver. I have used the ANSI C functions and the NIDAQmx.h and NIDAQmx.lib.

Additional InformationAlthough the methods above will work, the maximum sampling rate for a DAQ device depends on more than just the device specifications. While the device is capable of meeting the published specifications, the data acquisition relies on other components of the system, like what resources are available in the computer. For example, a machine using 6 DAQ devices in its 6 PCI slots or USB ports at the same time will perform slower than a machine with just a single DAQ device. In this case, the limit is the available bandwidth bus, which in case of PCI and USB, is shared. Rather than one card getting the full bandwidth, each card in operation shares the total bandwidth and therefore bottlenecks the data acquisition.

Hi John, Thx very much for your reply, Let me summarize for you the story. I am working on a neural recording system provided by Plexon inc which is also equiped by a video camera for the behavioral recording. The system has three PCI cards: PCI-6071E (for the continuos analog signals); PCI-DIO-32HS (intfaces the recording system server) and Access PCI-DIO-24d wirth Counter(s) (camera timing and digital output). All started afetr a blue screen of the PC. At this point I was able to run all the recording system but the video camera software.

There is two consecutive error messages (Digirtal IO open error and CTTT access I//O board is not found). Design Tools on this page. Through the device manager I was able to see only the first 2 PCI cards but not the DIO-24.

Through NIMAX I was not able to visulaize any of the 3 PCIs. At This point I thought that the best thing to do is to upgrade the national instrument software but the problem was the same as before. The tech support from Plexon inc suggested to uninstall the national instrument soiftware and install the original one (TDAQ741). Trying to uninstall the software by running the uninstaller, at some point there was awarning (unfortunately I don't remeber it exactly) but I finished the removing. After that trying to install the older version there is always the message that there is a newer version already installed even if I can't see it through Add or Remove programs.

The last thing I tried to do is to reinstall the newer version, I still not able to see the program through the add remove programs and I am not able to find the shortcut to NIMAX but I can see the national instrument file in programs and files. Sorry if my e-mail is confusing (I am new with the english language)and thx you very much for your Help. Hi Ahmad79, It sounds like you have two issues now: Original Issue: The Access PCI-DIO-24d isn't an NI product, so I can't really give any advice on this. You mentioned that the two NI boards do show up in Device Manager--what do they show up as? Perhaps they are not associated properly with the NI Driver.

To give exact instructions I'd have to know what OS you are on, but you should be able to manually associate the hardware with the appropriate NI driver through Device Manager. If the installation of your driver is corrupt, the best bet is to try to do a /reinstall. Simply run the installer through the command prompt with the /reinstall flag set and this will force the installer to overwrite the existing files. However, if you have a more recent version of the T-DAQ driver installed you won't be able to run the older installer. Windows does not allow multiple versions of the same hardware drivers to be concurrently installed.