Automatic escalator is the escalator that will automatically ON when there are people who will ride. And OFF automatically if within a certain time period did not detect any escalator people will ride.
Description:
* S1 - Sensor passenger arrivals
* S2 - Sensor passenger departure
* MOTOR - Motor drive escalator
Scenario
* If S1 ON, the MOTOR ON and OFF TIMER1
* If S2 ON, then ON TIMER1
* If TIMER1 ON, then OFF MOTOR
First rung. If S1 TIMER1 ON and OFF, then ON MOTOR. The output value of 010.00 bits (MOTOR) is used as a lock (bit-locking).
Rung 2. If S2 ON, then OFF for S1, Timer1_ON conditions will be ON. Usage instructions DIFU (13) serves to indicate that a higher priority than the S2 S1. And that must be OFF when S1 TIMER1 ON. This is to anticipate the possibility of S2 ON longer than the S1.
Third rung. During the Timer1_ON = ON, then ON TIMER1. If the value of TIMER1 met then TIMER1 MOTOR breaks the circuit so that the escalator will stop running.
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