When you run into the yellow question mark in Allen Bradley's RsLinx when browsing, it means that RsLinx does not have the EDS files to identify the device.

Usually you have to download the EDS file from the internet but many devices have the EDS files stored on them. Right click the device and see if you have the option to "Upload EDS file from device".

Solve The Yellow Question Mark On Allen Bradley Devices In RsLinx By Downloading EDS From The Device

When you run into the yellow question mark in Allen Bradley's RsLinx when browsing, it means that RsLinx does not have the EDS files to identify the device.