Communication Issues – TFMData version 4.6.1 and Older

When you trying to “poll” your monitors using our TFMData software and nothing is happening, the first thing you want to check is to see if Windows and TFMData’s Com ports are matched.

First, click the “Start” button, then RIGHT click “My Computer”, then click “Properties.”


In the new window that opens, click the “Hardware” tab, then click the “Device Manager” button.


In the next window that opens, click the Plus (+) sign next to “Ports.” here you want to see a Com number assigned to the TFM USB box. For example, “RS-485 Port (COM 3):

3 copy

As long as it is assigned COM 3 or COM 4, then the USB box is correctly installed in Windows. If a different COM port was assigned, 5,6, and up, then it would have to be changed to 3 or 4. You can have you  own IT guys help you with that, or you can give us a call and we can guide you over the phone how to do that.

Now we want to check within the TFMData software to make sure the COM port matches with what Windows has assigned.

In the TFMData software, click “Setup”, then click “Com Port”


In the next window, it should say Com 3 or 4. If it does not match, try using the pull down menu to see if it lets you choose the correct port.



If the ports match on both TFMData and Windows, and you are still having polling issues, then the problem could be with the cables or in the monitor itself. If you cannot get the ports to match, then the problem could be with the USB box, its cable, or, on rare occasions, the computer itself. At this point you can give us a call at 888-222-9829 and we can determine if the unit needs to be sent in for repair.

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