This read-write Integer32 (0..255) sets, in seconds, how long the PDU waits before turning outlet 9 back on after being commanded (or restored) to power on. An admin uses this power-on delay to stagger a sequenced restart across the PDU's outlets, avoiding an inrush current surge if every connected device tried to boot simultaneously. For example, an admin configures outlet9ONdly to a late-stage delay so this near-last outlet in the sequence avoids adding to the initial surge of current when power first returns.