Digital display for chart suddenly quit showing values but data still being charted

[Bernie W]

I am using LabView 7.0 and charting multiple values on one waveform chart.  I have selected the "show digital display(s)" option in the waveform chart properties.  The waveform data is in the form of a two-dimensional array.

The application has reliably been charting data and showing digital display of values simultaneously, suddenly the digital displays quit showing data but the chart continued to plot valid data without any problem.

How could this be possible?  What are possible causes?

Regards,
Bernie

[devchander]

Chart just picks out a point at uniform intervals and keeps updating it in its digital display.

Now, if you are feeding a periodic signal, probably the same point in each cycle is being shown and you would get a perception that your digital display is getting updated

By any chance, are you saying that your digital display is not showing any data at all????

[Bernie W]

Yes, I am saying that the digital display quits showing any data at all while the chart keeps plotting valid data.

[chrisger]

hi there

is the attached vi conform with yours? does it show the error?

if so i'd suggest to update, i created it with 7.1 and there's no problem at all (i have several apps with charts and digital displays but never seen something like you have described.)

can you tell how long it takes (in seconds and # of datapoints) until the displays freeze?

[Ben]

I can confirm that you are not alone!

I noticed it in in one of the LV 7.X version after LV8.0 was released.

I concidered it a bug but never reported it !

Ben