2. Design a PLC program and prepare a typical I/O connection diagram and ladder logic program that will correctly execute the hardwired control circuit shown below. L1 L2 FWD Stop REV PB 3 PB1 PB 2 R-1 OL elo PL1 F-2 F-1

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MECT444Programmable language controller
2. Design a PLC program and prepare a typical I/O connection diagram and ladder logic program that will
correctly execute the hardwired control circuit shown below.
L1
L2
FWD
Stop
REV
РВ З
PB1
PB 2
R-1
OL
PL1
F-2
F-1
PL2
R-2
Assume: PB1 pushbutton used is an NC type. PB2 and PB3 are each wired using one set of NO contacts. OL
contact is hardwired.
3. Three motors (M1, M2 and M3) will be run in a system. Two start (NO) and one stop (NC) button will be used
to operate the system. When the first start button is pressed, the first motor (M1) and the second motor (M2) will
start to run, but when the first start button is released the first motor (M1) will stop and the second motor (M2)
will continue to run. When the second start button is pressed, the third motor (M3) will start to run, but even if
the second start button is pressed before the second motor (M2) is running, the third motor (M3) will not be able
to start. The system will be stopped at any time with the stop button.Design a PLC ladder logic program that will
correctly execute the operation of the three motors.
4. Write the PLC ladder program of the periodic operation of a motor (M) that can rotate in right-left directions
according to the criteria given below. The engine starts with the Start button (NO), and stops at any time with the
Stop button (NC).
(Turn right 5 seconds, stop 3 seconds, turn left 5 seconds and stop 3 seconds)
Transcribed Image Text:2. Design a PLC program and prepare a typical I/O connection diagram and ladder logic program that will correctly execute the hardwired control circuit shown below. L1 L2 FWD Stop REV РВ З PB1 PB 2 R-1 OL PL1 F-2 F-1 PL2 R-2 Assume: PB1 pushbutton used is an NC type. PB2 and PB3 are each wired using one set of NO contacts. OL contact is hardwired. 3. Three motors (M1, M2 and M3) will be run in a system. Two start (NO) and one stop (NC) button will be used to operate the system. When the first start button is pressed, the first motor (M1) and the second motor (M2) will start to run, but when the first start button is released the first motor (M1) will stop and the second motor (M2) will continue to run. When the second start button is pressed, the third motor (M3) will start to run, but even if the second start button is pressed before the second motor (M2) is running, the third motor (M3) will not be able to start. The system will be stopped at any time with the stop button.Design a PLC ladder logic program that will correctly execute the operation of the three motors. 4. Write the PLC ladder program of the periodic operation of a motor (M) that can rotate in right-left directions according to the criteria given below. The engine starts with the Start button (NO), and stops at any time with the Stop button (NC). (Turn right 5 seconds, stop 3 seconds, turn left 5 seconds and stop 3 seconds)
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