read and display data from PC COM1 & COM2

[starflow]

Hello, I am looking for help in order to use LabView to do the following:
I want to read from RS232 dataloguer output information and write
this in a text file format and then another LabView rutine should read
de information from the file and present the data in a graph. This
basically what my Meteorology interface is doing at the moment but I
want to use LabView for this purpose.
I've been doing some tests but unfortunatelly I haven't gone very far.
Many thanks, regards. Jose Carlos

Hola, buzco ayuda para hacer una peque~na aplicaci'on con LabView:
Necesito leer la salida del puerto RS232 de un dataloguer usando el
puerto de comunicaci'on del ordenador COM1 y escribir estos datos en
un fichero de texto. A continuaci'on otra peque~na rutina en LabView
deberia leer la informaci'on desde el citado fichero de texto y luego
presentar estos datos en una grafica.
He estado trabajando en este tema desde hace tiempo pero sin mucho
exito; espero me puedan ayudar con alguna sugerencia.
Muchas Gracias. Jose Carlos

[netminder39]

Perhaps this may help you get started...
http://cnx.rice.edu/content/m12294/latest/

I was able to reference it to setup serial data logging in 7.0 on XP from a PIC. You'll need the Drivers CD to install the Instrument I/O Assistant.

Note: I haven't figured out how to get the Instrument I/O Assistant to work with 7.1.1 -- but that's a different subject that I've posted a q on here:
http://forums.ni.com/ni/board/message?board.id=170&message.id=127999

[unclebump]

What type of instrument do you need to read data from??

[starflow]

Many thanks for your information, still I haven´t been able to build
the Vi because I do need the Instrument I/O Assistant Version 1.0.2
I prefer not to install Version 1.0.1 because maybe not fully compatible
with LabView Express V7.1 I will try to install Instrument IO assistant
from the same CD than LabView 7.1
Thanks again

[starflow]

Hello, my aplication is very simple. I am trying to read the
RS232 output from a very common dataloguer Model DAU16 that
belong to Casella Automated Met System (AWS).
Thanks, regards.

[unclebump]

Is this the datalogger?? This could be a newer module. Do you have any manuals for this thing??

[starflow]

Hello, it was very kind of you for sending the new casella dataloguer
manual. The Casella dataloguer, Model DAU16 is priot to the model that
you found documentation. For the DAU-16 I have got printed documentation
(manual) but not digital manual; I´ve been searching on the web etc. for
this manual but with very little succes.
Both dataloguers works on similar philosophy, in fact they are compatible
and the data format coming out of the RS232 port I guess is the same.
Thanks again for your interest. Regards.

[Diego_M]

Hi,

I send two links where you can see how to communicate with your instrument using RS-232 port and other example where the data are saved into a file after being acquired.

http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=C3279BDB00F42BEBE034080020E74861&p_node=DZ52363&p_source=External

http://venus.ni.com/stage/we/niepd_web_display.DISPLAY_EPD4?p_answer=&p_guid=B45EACE3E8BB56A4E034080020E74861&p_node=DZ52058&p_rank=&p_source=Internal&p_submitted=N

In order to read the data of the file you can see the example on the Labview´s help on Fundamentals>>File Input and Output

I hope this helps you

Regards

Diego M.

[unclebump]

I think we need another manual. I found this info in the pdf file.

A full and detailed description of all the commands available on the Sensus
Logger is beyond the scope of this handbook. When this information is
essential to your particular application, please contact Casella CEL and
request a copy of the document: Sensus - A Programmers Guide (HB3291).

[starflow]

OK thanks, I will contact Casella asap.
Regards.