Hi I´m working on a sofware which will read out the metering data from a smart meter, throught the built-in serial port. This data will be written and saved to a txt file. However, this Vi works exactly as predicted in highlight execution, but in normal mode it either does nothing, or saves some invalid data. The first VISA read loop works fine (in either mode), and I´m fairly certain that the second VISA read loop seems to have some issue. I´ve tried adding a delay to the second read VISA function but, then i lost a lot of data. I´m new to Labview, so don´t hate too much :D. Every help would be appreciated. Thanks

LabVIEW

Vi works in highlight execution but not in normal

There's something screwy going on here. In your code, you set up VISA and enable termination characters, and specify SOH (when a more common sequence is <CR><LF>). Then you show several examples of arrays of strings, with the final two strings being 0D and 0A. What is curious about that particular string is that the normal EOL, <CR><LF>, when converted to a Byte Array of unsigned byte (there's a function in the String palette to do this) and expressed in Hex is precisely the array [D, A].

I wonder if "protocols" are getting mixed up, and what should be being output is a string (possibly with several components, possibly separated by, say, commas), followed by the normal EOL (also on the String Palette). That makes more logical sense to me ...

Bob Schor