Not sure why your waveform sees nothing but your probe wire is on the array made by the loop so it will not execute until the loop is over.
I'll assume by your code the device puts out data without being queried. IF no data is available to read LabVIEW will wait 10 secs before timing out. This can be a problem for loops that are displaying data to the user as the loop will be unresponsive during this timeout.
In a case like this you cannot rely on the terminator character to give you a signal that the data packet is complete because the device is sending data out all the time.
Try to disable the term char first and then watch your indicator or even create an array of responses so that you can get at ALL the core data that LabVIEW is getting from the receive buffer from your device.
I would also increase the size of the buffer or leave it alone and let Windows handle it..
A lot of RS-232 devices act uniquely and some of them do not always follow a strict protocol. You need to see the characters coming
into your buffer to have a chance at designing a reliable interface to your device.
Hope it helps.
