Intro to Digi Systems ELEC50301 m031978j

Paul Morrison (m031978j@student.staffs.ac.uk) Normal situation - If the number of passengers is between "1" and "5", the system's job is limited to counting the number of passengers and does not issue any alerts, instead, sending out a signal to turn on a green light to indicate that the elevator is in good working order. Alarm Condition "1" - If the number of passengers exceeds "5", the system shall generate signals to; Generate an alarm, red light, display “FULL”, and prevent operation until the normal situation is restored. Alerting condition “2” - If the number of passengers is below "0," something is wrong with the system, either a process malfunction or unmonitored exits has occurred. A signal should be generated by the system to: Generate an alarm, red light, display “ERROR”, send a message to the maintenance company, and prevent operation until the system has been reset.