The sequence and details of operations are The door is opene

The sequence and details of operations are: The door is opened or closed using a push-button switch XI when momentarily pressed or a remote controller X2 which is also momentarily pressed. When either switch is depressed, the garage door will be opened if originally closed or closed if it was originally open. To open the garage door, the motor should turn counter-clockwise which is output Y21 To close the garage door, the motor should turn clockwise which is output Y22. Obviously, the motor cannot be run dock-wise and counter-clockwise at the same time (i.e. both outputs cannot be one at the same time). There are two limit switches that indicate if the motor is fully open X4 or fully closed X5. Excess load on the motor while running\'s detected by input X3. The garage door should reverse its direction when an overload (X3) is detected. The garage light Y23 will go ON and stay on for 60 seconds after each closing or opening. If an overload (X3 is detected), the light should blink in 0.5 second intervals until reset by XI or X2. Keep track of the number of times that the opener motor (Y21) is opened. Service light Y24 would illuminate after the garage door has been opened 1,000 times. The service light Y24 remains ON until it is reset by a reset push button X6. You are asked to design the automated PLC automated control system for the above mentioned control system. Show the details of the following tasks: Clearly define all the necessary inputs and outputs of the control system Clearly define all the internal relays or other components (if any), you use in the control system Develop the necessary Boolean logic expressions for the logic control system (no need to simplify it) Construct the ladder diagram for the control system.

Solution

(1) 5

(2) 3 (3) 4 (4) 5 (5) 6 (6) 7 (7) 1 (8) 10 (9) 11 (10) a