Please continue in the original thread and be patient.
Also, this temperature status VI again says it has no block diagram and can't be opened.
What version of LV are you using (the error message said 8.2.1) and what operating system?
I am using Labview 8.2.1, Windows Xp. I do not know if it is an easy chore to write data to the modbus VI and read the register?