Shredder - Program [PDF]

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CIRCUIT DIAGRAM



PLC PROGRAM



LEGEND: INPUT:



X0 =



T



PB1(FORWARD DIRECTION)



X1 = PB2(REVERSE DIRECTION)



X2 = PB3(STOP BUTTON)



X3 = PB4(AUTOMATIC BUTTON)



X4 AND X5 = SENSORS OUTPUT:



Y0 =



FLOW CHART



CONTACTOR 1



Y1 = CONTACTOR 2



Y2 = LAMP 1 ( FORWARD)



Y3 = LAMP 2 ( REVERSE)



This paper shows what is in the circuit diagram, explain how the program in PLC work and show the flow chart of a program in shredder machine.



CIRCUIT DIAGRAM It is the simplified conventional representation of an electronic circuit. It is the arrangement of interconnection of components on the diagram. For the circuit diagram of shredder machine, it shows that the PLC contains 6 components for the input and 4 components for the output. In the input, 4pushbutton and 2 sensors is connected on it. In the output, 2 contactor relay and 2 lamps are connected on it.



FLOWCHART The purpose of flowchart is to show the process to perform from start to finish. In the flowchart of shredder machine. It explains how the machine works.  Switching PLC on will start the process.  Press and release pushbutton 1 that is connected in X0 will deactivates contactor 2 and lamp 2 then activates contactor 1 that is connected in Y0 and will energized the motor to run in forward direction and at the same time Lamp1 will activate that is connected in Y2 indicating that the motor is in forward direction.  Press and release pushbutton 2 that is connected in X1 will deactivates contactor 1 and lamp 1 then activates contactor 2 that is connected in Y1 and will energized the motor to run in reverse direction and at the same time Lamp2 will activate that is connected in Y3 indicating that the motor is in reverse direction.  Press and release pushbutton 3 that is connected in X2 will de-energize the contactor and stop the motor.  Press and release pushbutton 4 that is connected in X3 will set your shredder in automatic mode. The shredder will not start unless when the 2 sensor that is connected in X4 and X5 will sense a material that will shred.



PLC PROGRAM Program is a collection of instructions that will performs a specific task when executed in computer. In a shredder machine, PLC is used for the motor control of shredder. This will explain how the program works.  Press and release pushbutton 1(X0) will activate Y0 and Y2 with 3s delay before it will run. Timer is for making sure that the motor will totally stop before it will run in forward direction if it is running in reverse direction. To make the process continuously, the timer(T0) will latch.  If the motor is in forward direction and you want it to reverse the direction of it, press and release pushbutton 2(X1). It will stop or cut the connection of the first rung of the ladder because of the normally close X1 will open after pressing PB2 and will activate the 2nd timer(T1) with 3seconds delay before energizing the contactor2 and lamp2(Y1, Y3). Latching (T1) will make the motor run continuously.  Press and release PB4 make your system automatically and energize the internal relay M1 to have a contact in rung 6. X4 and X5 will closed when the sensors sense a material that will shred and the motor will run.



 Press and release PB3(X2) will stop the system. BATANGAS STATE UNIVERSITY College of Engineering, Architecture and Fine Arts Alangilan, Batangas City Electronics and Communication, Instrumentation and Control and Mechatronics Engineering Department



MexE 513: Mechatronics Systems Design Shredder Machine Program in Shredder



Garcia, Arvin E. MEXE-5101



Engr. Louie L. Villaverde Instructor