I may be able to answer your questions. Easiest way to kick off a notification or message using this would be to set the Ping Repeat to a timeframe that you feel is reasonable, save the change, and then enter the IP address you want to have checked and hit Send Ping. After that it's just a matter of setting up a rule that is triggered by the presence attribute (may be under Custom Attributes in RM) going to not present, with an action of send notification.