This read-only Unsigned32, in joules per its source description, reports the energy this PoE port supplied to its attached device over the past 60 seconds, automatically updated at that interval. Admins use this minute-level figure as a practical everyday snapshot of a port's power consumption, useful for comparing energy use across ports feeding similar device types. For example, one camera port consistently reporting much higher LastMinute energy than a comparable camera on another port could indicate that device is malfunctioning or misconfigured.