RS232 and Graph

Hello !
I am new here and I would like to ask a question about Labview.
Can you help me ?
Actually, I am working on a project with a PIC.
The PIC sent 3 informations (that evolves in time) to Laview (in my case, it is current, tension and time)
To send these informations, I use RS-232.
Moreover, I have used examples from Labview called 'Basic Serial Write and Read'.
It is great ! It works and Labview can display my values thus : 'current;tension;time\n'
I would like to display these datas on 3 graphs.
I think my first step should be : De-multiplexing or try to convert my data (string made by RS232) into float.
What do you think ? How can I do that ?
Thanks for your help and advices.
Solved!
Go to Solution.

Hello !
Thanks for your replies !
I have followed your advices Lynn and the problem seems to have disappeared. Great !
Actually, I would like to ask just two questions about this topic and it will end my problems (sorry, I asked a lot of questions )
1) What about sampling and chart ?
Thanks to my PIC, I can measure current,velocity and tension. And I send datas every 200 ms.
Do the charts display my values every 200 ms ?
2) When I start "Writing", my charts don't start at 0 second. Why ? It looks like there is already something.
I recorded another gif in order to show you what's happened.
About what you did the last time, your method with Index Array is clearer and smarter. I will remember that.
[QUOTE]The constant array connected to the divisor input for velocity has 9 elements which are zero. Does dividing by zero produce the scaling you want?[/QUOTE]
About the scaling, I would like to divide each element (velocity, current and tension) by 10. So, I just used the divisor as you did.
I don't use the part 'Original velocity divisor'.
[QUOTE]The Read (and perhaps the Write) should be inside a loop. Do not use Run Continuously to operate this VI . That results in the port being configured and closed repeatedly. This could also contribute to your loss of data.[/QUOTE]
Alright, I added a While Loop instead of the old structure and I have deleted the last part in order to Run Continously
[QUOTE]Personally, I would use the Scan From String as mentioned by crossrulz. One function instead of two.[/quote]
Thanks for this advice. I am going to keep that in mind
Thanks for your help.
Attachments:
Basic Serial Write and Read2.vi ‏35 KB
test5.gif ‏1396 KB

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My problem is the following. Both of the NI-DAQ I placed using DAQ Assist, require to be in a while loop.
-If
I place them in separate loops, I have the problem of passing
information between the Input NI-DAQ and the PID, and also between the
PID and the Output NI-DAQ.
This is the best option---Use QUEUE or Functional global or something else to tranfer the data to and fro
How do I make that QUEUE or Functional global?
-If I place them both in one big loop, an error occurs saying that the selected buffer size is too small (Error -200609).
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you tried increasing the buffer? Is the acquisition happening
parallelly (means to say the first DAQ not wired (error terminal) to
second DAQ)
Well the buffer is, at least how I understood it, the option Number of Samples when in Continuous Samples mode. Concerning the parallel acquisition, do you mean I should wire the error ports of both of the DAQs?

RS232 and Graph

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