This read-only Integer32 is a bitmap where each bit flags whether a specific measured channel has dropped below its minimum (critical low) 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 lower critical limit, then drills into the specific probe or phase. For example, if alarmsMinMap has bit7 set, the admin knows voltB has sagged under its minimum threshold, which could indicate a failing input feed on that phase.