42 Rockwell Automation Publication 1734-UM020B-EN-E - August 2019
Chapter 4        Configure the POINT I/O 4 Channel IO-Link Master as IO-Link Master Using the Studio 5000 Add-on Profile
The Observation tab contains only I/O data, which can be used for 
debugging.
The Parameter tab holds the most commonly used parameters to set up an 
IO-Link device. Parameters with the highest usage are placed at the top.