KEYENCE TM-3000 Series - Manual (Page 71)

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USB Communication Failure
- Setup software TM-H1 TM-Navigator User’s Manual -
3
Select the device that is not recognized correctly on the device manager.
Look for a device with the "?" or "!" mark next to the name.
If the controller is not recognized correctly, it appears as one of the following:
• "?" or "!" mark next to "KEYENCE TM-3 (USB)"
• An "Unknown device"
If either of these devices is displayed, double-click on the device name. The property window for the selected
device is displayed.
Reference
If there are no device classified as "Unknown device", check for the device under "USB controller".