In this VI ( please take a look at the attached file ) i do a loop back test with the COM1 port, if i reduce the delay-before-read time to less than 15 ms ( this value can be different in your computer i think ), the program can not work properly any more.
delay >= 15ms
delay < 15 ms
So what is the problem here ?
Can i do something to solve this problem ?
Thanks in advanced !