![]() Parking full flag, being NC, keeps the circuit closed and car entry input decrements the counter every time a car enters. ![]() Īs long as the number of cars in the parking lot is less than 50, the counter O/P is OFF.Entry of every car decrements the counter. īoth start and stop I/P switches are momentary types in actionĮxample 2: Car door open alarm generation functionĪny one or more doors getting opened (I/Ps becoming on) and car key I/P in enabled state (on), activate cabin lamp O/P and buzzer O/P (becoming on).Įxample 3: Parking full indication and closing the gate.When stop I/P switch is momentarily pressed, O/P M gets disabled (becomes OFF), resets its flag M, and gets de-latched (stays OFF). ![]() When start I/P switch is momentarily pressed, O/P M gets enabled becomes on), sets its flag M, and gets latched (stays on)
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