AI Clock Config error with PXI 6052E and SCXI

[Kallis]

Hi,

I'm using PXI 6052E and SCXI-1520, 1125 and 1102 with SCXI-1001 chassis. Till a few days ago all these were working properly. But now if I try to acquire any number of channels from scxi-1520, I get this AI clock config warning(10685) and the data read will be NaN. If I try to read scxi-1125 and scxi-1102, then I'm getting a time out error. :(my scan rate is just 100 samples/sec)

Hope someone can help me out in solving this.

Kallis

Message Edited by Kallis on 12-21-2005 10:04 PM

[devchander]

Hi Kallis,

In what order have you placed these modules in your SCXI chassis?

which module is in slot1, slot2 and slot3?

regards

Dev

[Kallis]

Hi Dev,

The order is..

Slot 1: 1520
Slot 2 to 8: 1125 ( seven numbers)
Slot 9: 1102

Kallis

[devchander]

Hi Kallis,

The order in which they are put seems ok.

Can one of your scxi modules be faulty????

Check for all modules individually by keeping just one module at a time in slot 1, multiplexing it your DAQ and then, acquire from it.

Regards

Dev

Message Edited by devchander on 12-22-2005 02:16 AM

[Hal_L]

Hi Kallis,

Along with devchander's suggestion, I also suggest running some shipping example programs to perform your data acquisition.

I found some information on the 10685 warning. Since is a warning, data acquisition is not actually interrupted. Warnings only appear if you put an indicator on the error cluster. To ignore this and other warnings, use an Error Handling VI rather than an error indicator. A suggested choice is Simple Error Handler.vi on the Time and Dialogue subpallete of LabVIEW. This error handler will ignore all warnings, preventing the erroneous 10685 warning from being reported. This warning only appears to be a problem with the Traditional NI-DAQ (Legacy) driver.

I also noticed that you are using the Traditional NI-DAQ (Legacy) driver. I highly recommend upgrading to the NI-DAQmx driver. It is more efficient and easier to use. Here are a couple with more information about DAQmx.

NI-DAQmx Frequently Asked Questions

Learn 10 Functions in NI-DAQmx and Solve 80% of Data Acquisition Applications

Transition from Traditional NI-DAQ to NI-DAQmx

Regards,

Hal L.

[Kallis]

Thanks a lot Hal L,

Actually the system was developed a couple of years back and the entire software was written with trad DAQ. And the issue is even though it gives just a warning, the values provided by AI Read is not correct(NaN), which puzzles me a lot...

Kallis

[Kallis]

Hi Dev,

Tried your suggestion of checking modules one by one...and the 1520 module is causing all this...Without this module all other modules work properly...

Thanks a lot to all who responded...

Kallis

[devchander]

Hi kallis,

Glad to know, u were able to find the source of mischief!

Regards

Dev

[devchander]

Hi Kallis,

Glad to know, u were able to detect the source of mischief!

Regards

Dev

[Hal_L]

Hi Kallis,

Were you able to run the example programs?  Although your code was developed in Traditional NI-DAQ (Legacy), I would like to see if you can run the DAQmx examples to make sure that you can acquire valid data. Please keep me informed on your progress with this.

Regards,
Hal L.