Waveform charts are really useful but have an annoying bug. Every now and then (maybe once every 10 seconds depending on the update rate), the digital displays blink to zero even though a zero value was never written to the chart. I use these charts frequently in HMI type displays and explaining this behavior is always part of the training for new operators ("Don't worry if this critical sensor goes to zero for a second unless the line on the chart also goes to zero, then you should freak out and hit E-stop"). This has been brought a couple times over the last 8 years (http://forums.ni.com/t5/LabVIEW/Waveform-chart-digital-display-blinks-zero/td-p/554868) but has never gained enough attention to be fixed. I know this functionality could be duplicated with additional numeric indicators or even an xcontrol but I would prefer to just have waveform charts function correctly. I attached a VI that shows this behavior. All three of the digital displays randomly blink to zero.
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