casio ct3000h balance rs 232 communication

[Nathancbr]

Hi

I am working with a casio ct3000h balance to register weight changes on food during drying inside a vacuum oven.

This balance sends data every time the weight changes so there is no time expected for data transfer from it.

I use the example Advanced Serial Write and Read.vi and modified it to just read.

The problem is that if I put a low number (10 s for example) in timeout visa configure serial port, I get the error 1073807339 timeout expired,

if I put a high number (3600) the program runs but cannot be stopped and freeze when I try to end it.

The data that I get is like this

2B 20 20 20 20 35 2E 36 20 20 67 0D 0A (hexadecimal)

+    5.6  g (character)

 2B 20 20 20 20 38 2E 37 20 20 67 0D 0A (hexadecimal)

+    8.7 g (character)

 2B 20 20 20 31 31 2E 32 20 20 67 0D 0A (hexadecimal)             

+   11.2 g (character)

I wonder if I should use the Xon\Xoff character

Thanks in advance

Carlos Fuentes

[Albert.Geven]

you can read the number of bytes available via a property node. Check the serial functions "VISA bytes at serial port"

Then wait until bytes at serial port > 13 and then read, no freezing anymore.

[Nathancbr]

thanks a lot for your help I modify my program using your suggestion and it works fine

I attach my program for anyone who could use it

Carlos Fuentes

[Albert.Geven]

Thanks for posting