Hi Tad,
There is a good How To Page that you should look at for this report. [HOWTO - Create a Consolidated Uptime Report][1]
You can also look at the Ping Monitor Uptime report. [Uptime Reports][2]
[1]: https://www.poweradmin.com/help/SM_4_2/howto_consolidated_uptime_report.as
https://www.poweradmin.com/help/SM_4_2/howto_consolidated_uptime_report.aspx
[2]: https://www.poweradmin.com/help/SM_4_2/report_uptime.aspx