2 LabView applications using COM1

[wakka321]

Hello, I am new to LabView. I was playing around with two identical (different name) applicaitons that get data from HH506R (thermometer) through RS-232. When I run one application, I read room temperature. However when I run both applications, one reads room temperature while the other doesn't. Thanks.

[Albert.Geven]

On the same machine at the same time and without error messages ?

[Albert.Geven]

On the same machine at the same time and without error messages ?

[johnsold]

Probably the applications have no error handling.

To wakka321: The OS will only allow one application to control the port at a time. And it may not tolerate rapid switching between applications even if both cleanly release the port after using it.

One of the applications should do all the communications with the remote devices.  It can then pass the data to and from the other application.  Search for posts on Inter Process Communications.

Lynn

[wakka321]

Thanks for the replies