Hi,
I am new with LV RT and LV 8.0. Now I need to set up a closed loop control system using LV 8 RT and a NI USB 6009 as the DAQ device. That is, the USB 6009 is connected directly to the host computer via a USB cable, and the host computer itself also works as the RTX target to control the USB 6009. The host computer is running on XP.
First of all, when I created a real-time target, from the real-time project wizard, I only see the PCI-7041 as a target (or device) when I was asked to browse the local target. How can I set up the host computer as the RTX target? How do I know that the RTX extension is already working? (I can see the RTX is installed since I saw teh path the C:\Program files\National Instruments\LabVIEW8\Target\NI\RT\RTX.)
My second question is that if I use the timed-loop in data acquisitions, how do I set up the loop to run on the RTSS instead of the Windows timer? In other words, how do I specify using the RTSS? I am asking this, because it seems to me that without using the RT module, I am still able to run a timed-loop and set different priorities for different loops under Windows. If this is the case, what is the difference in using the timed-loop between the RTSS and the Windows? Or put it this way, since you already have the timed-loop structure with priority, which can be used to reduce jitters, what is the advantage of using RTSS over using Windows? From this question, a further question would be that, is the timed-loop with highest priority preemptive under Windows?
Thanks in advance for any response to my basic questions about the RT applications.
William
