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error 22 labview

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#1 idans

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Posted 30 October 2014 - 06:32 AM


i use ljstream.vi to aquire signal from 1 channel. i change the code in the example as seen in attached pic so,

num of chanels is 1 and the channel name and gain arrays size is 1. when i run it i get error 22 getting from ljstream start vi. 

the scan rate is 100hz same as in original example just then the number of chaanels was 4.

what is the problem?

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  • error code22 labjack.jpg

#2 LabJack Support

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Posted 30 October 2014 - 07:52 AM

That U12 error means illegal scan rate:




... but based on your description I am not sure why you are getting that:




Please open the front panel of the AIStreamStart sub-vi, and then do an Alt-PrintScreen so you can send us a screenshot of that window showing the values you passed in and the error out.

#3 LabJack Support

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Posted 30 October 2014 - 07:55 AM

... actually you can see here that the valid range for sample rate is 200 to 1200 samples/second:




4 channels at 100 scans/second is 400 samples/second, so good.  1 channel at 100 scans/second is 100 samples/second, so invalid.

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