NI 9211 cold plug

[nguyenduyhung]

I am using NI 9211 and NI 6009 for remote data acquisition

Becuase I am away from acquisition devices, I can not re-plug NI USB. I have to use ssh for any interaction with acquisition computer

The problem is that whenever computer is rebooted, NI 6009 can be recognised by lsdaq but NI 9211 are not. Even the light on NI 9211 is not powered on.

If NI 9211 is hot-plugged, then it works

So NI 9211 can not be cold-plugged?? Please help a workaround

Nguyen duy Hung

[David L.]

Hi Nguyen duy Hung,

Are you using the USB-9211(Mac OS X and Linux) or USB-9211A(Windows)? I wanted to verify that I understand your meaning of “hot” and “cold” plugged. I understand “hot” plugged to be plugging in the 9211 while the computer is on, and “cold” plugged to be having the device in the computer when it is restarted or plugging in the device to the computer while it is off. I also believe that you are fixing the 9211 problem by (after the computer is booted up) unplugging the device and plugging it back in.

I have attempted to recreate your problem, but have had no success by trying all combinations of restarting and turning on/off the computer, along with hot swapping devices.

Do the devices switch behavior if they switch USB ports? Does the 9211 have the same behavior on another computer, and are you currently using a laptop or desktop? What O.S.?

Since the light on the 9211 is not coming on, this means that it is not getting power or initializing correctly. Are you using the latest DAQmx driver version (8.3.1)? You can find what version you are using by opening Measurement and Automation Explorer » Software Folder » clicking on NI-DAQmx.

[nguyenduyhung]

"Are you using the USB-9211(Mac OS X and Linux) or USB-9211A(Windows)? "

It is Mandriva 2006, desktop Mandriva 2006 kernel  2.6.12-12mdk  i686 Intel(R) Pentium(R) 4 CPU 1.80GHz

with NI -DAQmx Base for Linux version 2.1

"I wanted to verify that I understand your meaning of “hot” and “cold” plugged. I understand “hot” plugged to be plugging in the 9211 while the computer is on, and “cold” plugged to be having the device in the computer when it is restarted or plugging in the device to the computer while it is off. I also believe that you are fixing the 9211 problem by (after the computer is booted up) unplugging the device and plugging it back in."

Yes, you are right.

"Do the devices switch behavior if they switch USB ports? Does the 9211 have the same behavior on another computer, and are you currently using a laptop or desktop? What O.S.? "

NI 9211 can not "power on" , i.e. the light simply does not turn on, if plugged in to some USB ports. In fact I have to buy DUB-H7 D-Link USB hub according to advices from your Asian support team (They said this hub is used successfully at their demonstration). With this hub then NI 9211 can be powered on with any computer. But it suffers the same "cold plug" problem

Currently, I use a desktop computer connecting to 9211 and 6008 directly (not through above USB hub). Among my destops, this computer is the only one that can "power on" NI 9211

"Since the light on the 9211 is not coming on, this means that it is not getting power or initializing correctly. "

Yes, hot-plug for  a USB  devices is supposed to do any device initialisation. I believe that NI 9211 cold-plug failed to initliase as correctly as cold-plug. How can we  "re-initialise" NI 9211 when it is cold-plugged??

Thanks

[David L.]

Nguyen duy Hung,

This was reported to R&D (CAR ID# 470HO4HR) for further investigation. Our branch is correct, in that a possible workaround is using a powered USB hub. Another is not turning the computer off, as once the 9211 is on and running, restarting the computer still allows the USB-9211 to be powered and active. A last workaround is using the USB-9211 on a Windows machine, where this problem is not present.

Message Edited by David L. on 03-01-2007 09:20 PM