Comparators — Greater Than, Less Than, Equal

स्कूल Maths Class — यह पहले से ही सीखा हुआ है

Teacher पूछता है: "Is 23 greater than 24?" आप दो numbers को compare करते हैं और एक answer देते हैं — yes या no। यह एक comparator है।

Greater Than ( > ) — Pressure Cooker

Safety rule: अगर pressure 2 bar से exceed करता है → तो release valve खुलता है।

Pressure 1.8 bar  →  1.8 > 2.0?  →  FALSE  →  Valve stays closed
Pressure 2.3 bar  →  2.3 > 2.0?  →  TRUE   →  Valve opens

BMS example — high temp alarm:

Supply air temp = 19°C, limit = 18°C → 19 > 18 → TRUE → Alarm raised

Less Than ( < ) — Home Water Tank

Low level: अगर level 20% से नीचे drop होता है → तो pump start होता है।

Level 45%  →  45 < 20?  →  FALSE  →  Pump stays off
Level 15%  →  15 < 20?  →  TRUE   →  Pump starts

Equal To ( = ) — Lift Door

Lift door तभी खुलता है जब cabin floor level पर exactly होता है। ना ऊपर। ना नीचे। Exactly equal।

Cabin at Floor 3 = Floor 3 sensor → Equal → Door opens

BMS example — Modbus register verification commissioning के दौरान:

Expected value = 100, read value = 100 → Equal → Communication verified
Expected value = 100, read value = 87 → Not equal → Check wiring