Handheld · Janus

Later · not in R1Neo 0039, 0033 §7

The occupancy walk: a tier read bay by bay, the counter tapping "Empty" or "Reel here" on each sensed bay, marks kept offline.

Not in R1: The sensor already knows occupancy; an R1 Count checks identity (pull, scan, push back), and offline counting is later.
R1 instead: Count · check each reel: bays recorded empty that read Clear are confirmed by the sensor, never visited. Open it