I have been noticing this happening occasionally, but I don't understand what is causing:
The channel in question above is C1:DAQ-FB0_C1SCX_STATUS. This channel is (I believe) reporting some status of the front end model communication with the frame builder, but I'm not sure exactly what.
Usually this problem goes away when I restart the model or the frame builder, but it didn't work this time. Tomorrow I will figure out what this channel means, why it's sporadically going red, and how to correct it.