Switch Posted June 25, 2009 Share Posted June 25, 2009 I have 4 LJ U3 device, each with a different local ID, used for doing the same test. They are used with the LJ relay drivers to periodically control relay on a circuit. Instead of having a separate software for the different device # or changing the device number manually for all the channels every time, I added a device select symbol which changes the device # between 1-4 for all the channels in the software when pressed. if device_select = 1 mychannel1.devicenumber= 2 etc The problem is when one LabJack is running and I setup another one on the same computer, I will interfere with the first test as I switch between device # 1 to 4. I get a communication error since its like trying to run two DF programs on the same LabJack. I am wondering if there's a way to detect if a LabJack is being used by another DF software and communicating with the PC so I can write code to skip that device number, or better yet, if you can recommend an easier way to implement this feature. Thanks! Link to comment Share on other sites More sharing options...
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