You need to look at the conditions for each. So for free wheeling you would need to possibly monitor for the RPM dropping and staying at a particular level but the speed either increasing of staying constant. Same for over revving, you need to set a warning RPM that will trigger the generation of the event.
I would recommend that you do a drive test in a target vehicle with a notebook attached to the tracker so you can get the data feed and perform the conditions that you are looking for and review the log.
You may need to set up some virtual sensors to help with the event capture
Mobile Visible Secure
Specialists in data acquisition and analysis for mobile and fixed assets. Integration in to content management systems is a specialty we have.