If you are using Serial Write and not VISA Write, you must have an old version of LabVIEW but even then, either function can send ASCII and in fact, the only thing you can wire as an input is a string. Unless you've configured the string control/constant for hex display, the serial write is sending the ASCII text of what you have entered. You may be sending an incorrect string or a string incorrectly terminated. Do you need to send a carriage retrun/line feed at the end of each string? Have you tested the communication with another program such as Hyperterminal? Are you using a shipping example or something you wrote? If it's a shipping example, which one and if it's something you wrote, why don't you attach the code?
