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SCXI -200284 Error

Working on an SCXI project that takes thermocouple readings periodically.

The thermocouples readings are finite measurements, 10 samples per channel, at a rate of 100 Hz. The 10 samples are taken, averaged, and reported. This process happens once every second.

The SCXI will function fine for 3-5 days (variable) and then throw an error:

 

Error -200284 occurred at an unidentified location

Possible reason(s):

Some or all of the samples requested have not yet been acquired.

To wait for the samples to become available use a longer read timeout or read later in your program. To make the samples available sooner, increase the sample rate. If your task uses a start trigger,  make sure that your start trigger is configured correctly. It is also possible that you configured the task for external timing, and no clock was supplied. If this is the case, supply an external clock.


Once this happens, the SCXI appears to still be connected in NI MAX, but I'm unable to acquire any readings in Test Panel. The only way to establish communication with the SCXI again is to power-cycle it.

 

Has anyone run into something similar before? 

 

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Pete_,

 

Thanks for posting on the forums. In order to understand your issue better could you please clarify what all hardware you are using and at what sampling rates?

 

How many channels are you acquiring data on? When you say 10 samples per channel at 100 Hz, do you mean you sample at 100 Hz on each channel, but then only read 10 samples at a time per channel? I was a little confused.

 

Also, I was able to find a support article on our site that addressed this error as a timeout issue.

 

DAQmx Read VI Error -200284 Samples Have Not Been Acquired

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P8XsSAK

 

You might want to play around with the DAQmx Read timeout settings or double check that you aren't trying to read more samples than have been acquired at any given time.

Patrick O.
Applications Engineering
National Instruments
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Also, are you sure you are in the correct forum?

This is the Fieldpoint forum which would be for Fieldpoint or compact Fieldpoint devices.  SCXI devices would go along with PXI or PCI devices.

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