You can sent that poller up as a "Counter" under the "Show Advanced Options" section when creating the poller. That will calculate the difference between two polls. If you want to get the per minute part, you have a couple options... The first is update your node polling interval to 1 minutes stats, but I wouldn't recommend that. The second would be to use the transform to divide by your polling interval to get a "per minute" value.
Here are some more details about the UnDP page itself: http://www.solarwinds.com/NetPerfMon/SolarWinds/wwhelp/wwhimpl/common/html/wwhelp.htm#href=OrionPHUniversalDevicePollerDefine.htm&single=true