RS232 programming for Sartorius scales using LabView

Has anyone written a any code to control and read in data for a Sartorius scale with RS232

Hi,
Unfortunately, I was unable to locate a driver for your instrument at www.ni.com/idnet or at the Sartorius website. I would like you to submit a request for this driver at: http://zone.ni.com/idnet97.nsf/instrumentdriverrequest/ and with the instrument manufacturer. We develop drivers based on demand and popularity so the more requests we have for it, the greater the possibility that we will develop one.
If you would like to try developing your own instrument driver (or modify the existing one), we have documentation, model instrument drivers, and driver templates to help at :
http://www.ni.com/devzone/idnet/development.htm
We also have a syndicate of third party vendors that specialize in National Instruments' products and services. Some of the vendors specialize in driver development. I would suggest contacting one of the Alliance members at:
http://www.ni.com/alliance
An instrument driver is a collection of functions that implement the commands necessary to perform the instrument�s operations. In short, someone read the instrument user manual and implemented some of the functionality in a program for the end user. Instrument drivers are not necessary to use your instrument. They are merely time savers to help you develop your project so you do not need to study the manual before writing a program.
There are example VI's in LV on Instrument Connectivity. If you go to the Help menu >> Examples.. >> I/O, you will see a couple and Examples.. >> Fundamentals for File and String manipulation. I would suggest tweaking them to suit your application. Also the specific command that your instrument responds to can be found from it's manual.
Some useful resources for your application are
ni.com > NI Developer Zone > Development Library > Instrument Connectivity
http://search.ni.com/?col=alldocs&layout=TechResources&ql=a , to search examples and knowledge bases
Hope this helps!
Best Regards,
Aaron K.
Application Engineer
National Instruments

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I have to use a Sartorius scales with a RS232 interface.
In the attachment you see the program with which I try to read the data of this device – so far not successfully.
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partial wrote:
Thank you for your reply.
Searching for drivers was one of the first steps I did. But unfortunately my device is so old (about 25 years) that there is no driver. I also tried to work with the programs of the LabVIEW LLB which are available from your link, but there I also get the 1073807339 error code.
Checking the cabling is for sure a good idea. So far it seems to be fine.
Thank you for your hint that the use of delays and the Bytes at Serial Port is incorrect.
But why is Bytes at Port then mentioned in this NI-document:
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RS232 programmin​g for Sartorius scales using LabView

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RS232 programming for Sartorius scales using LabView