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Serial communication (RS232) blocked after 25 hours fonctionning

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Hi everyone, 

 

i just finished my first testbench to burn 5 custom products simultany. i have to communicate with UUT every 2 min that my bench exchange 5 data frames ( Write 5 data & read 5 Data). 

after 25h11min of functioning, the testbench doesn't send any frame aymore. i remarked that the duration depends to number of UUT ( for example if test 4 UUT i have 41h52min and if i test 3 UUT i have 42h06min) i concluded that the maximum number of commands that the PC can send is 19226 commands. And now i don't know why is limited to this number of commands ? 

i notice that there is no execution error received, it just blocked! 

I use à LabView VI to communication with UUTs ! 

 

3 UUT ==> 42h06 // 1281 Lines/ UUT

4 UUT ==> 31h52 // 961 lines / UUT

5 UUT ==> 25.11 // 769 lines / UUT 

  •  3845 lines are the total capacity of the PC that it can send 
  • the total number of command is 
  • 3845 * 5 + 1 = 19226

Any help or track that can oriente my investigations 

 


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