This read-only Integer32 is a bitmap where each bit flags whether a specific measured channel has exceeded its maximum (critical high) threshold, with bit assignments given directly in the description: bit0-2 for the three current phases (currA/B/C), bit6-8 for the three voltage phases (voltA/B/C), bit12-13 for the two temperature probes, and bit14-15 for the two humidity probes. An admin reads this single value instead of polling every individual sensor to instantly see which class of measurement has breached its upper critical limit, then drills into the specific probe or phase. For example, if alarmsMaxMap has bit12 set, the admin immediately knows temperature1 has crossed its max threshold and can check temperatureProbe1's raw value without first checking voltage or current.