DAQmx buffer errors and data slow downs everywhere

[labview12110]

I cannot seem to figure out what happened to my vi and why all of a sudden I am getting a buffer overrun error. It is attached.

This is the error I am getting

Error -200279 occurred at DAQmx Read (Analog 1D Wfm NChan NSamp).vi

Possible reason(s):
Measurements: Attempted to read samples that are no longer available. The requested sample was previously available, but has since been overwritten.

What I am trying to do is just read and plot the data as quickly and efficiently as possible with as high a sampling rate as possible. I tried to sample at a higher rate (1kHz) but then my data has giant gaps in it on my charts ( i am just reading a voltage though so I don't know why that would be the case) .  I added a buffer greater than 1000 samples, tried to change the sample buffer like the ni error article suggested and I can't seem to figure this out. all the daqs except for dev 5 are the same. 5 has 16 analog input channels but im only using 10 of them.

[crossrulz]

1) Do not set the buffer size.  With continuous samples, it defaults to as much as the DAQ card can handle.

2) You need to read more than 1 sample at a time.  Reads 10 samples.  At 1kHz, that would be 10ms worth of data at a time.

3). You have a lot of processing and saving to disk happening in there.  Look into using a Producer/Consumer setup to put your logging to the TDMS file into another loop.  It won't slow down your reading from the DAQ that way.

[labview12110]

Where would I set that read ten samples is that on the sample clock?

Ill try the queue system again but I couldnt get it to work last time. All of my data was out of order and mislabeled. What should it look like if I want the same tdms header sheet and column names like I have now?

[crossrulz]

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@labview12110 wrote:
Where would I set that read ten samples is that on the sample clock?

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DAQmx Read.  You want Multiple Channels, Mulitple Samples.  Then there will be an input for the number of samples to read.

[labview12110]

Ive tried that before it took away my ability to perform calculations. Like say the color change loop. I want a 2d dbl for my data type yes?

[labview12110]

If I try a queue I cant use different data types it seems. Some of my inputs are strings and some are numbers. Do I make 3 different queues one for each data type?

[crossrulz]

Yes, you will want a 2D array of doubles.

You could do your color calculations inside of two FOR loops (one inside of the other) or just take one sample out of the ones read.

[labview12110]

Giving it a shot right now. Am I splitting up my data to their respective graphs properly? With the subarray function now

[labview12110]

Attached is a new VI with a queue system. My only issue is that my data is not all present in the file and is out of order. I also did not get all of it in the spreadhseet.