Programmable Logic Controllers - With Access
5th Edition
ISBN: 9781259933523
Author: Petruzella
Publisher: MCG
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Chapter 6, Problem 4P
Program Plan Intro
Programmable Logic Controller (PLC):
- PLC is a specialized computer used in industrial segments to control machines and process.
- PLC is program that consists of a set of instructions which resembles the controlling functions needed to perform specific tasks.
- The function of PLC is similar to that of a relay and hence, in an industrial segment a relay is greatly replaced by a suitable PLC.
- When compared to general Personal Computer (PC), a PLC is available in small and tiny sizes.
- The basic architecture of a PLC consists of an input-output interface module and a small Central Processing Unit (CPU) that runs by controlling
programming language.
Given:
The following assumptions regarding the hardwired control circuit is made.
- A Normally Open (NO) stop pushbutton is used.
- A NO run pushbutton is used.
- The jog pushbutton used here consists of one set of NO contacts.
- The Overload (OL) contact is hardwired.
- It consists of an output motor starter relay coil.
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Write a Ladder Logic PLC program for each of the following scenarios. Label all contacts and coils in the PLC program.
Scenario 1
Turn on a light when either one of two switches (I1, I2) is toggled on (construct an OR Gate). Turn on a second light when both switches (Same inputs I1, I2) are toggled on (construct an AND Gate). Turn on a third light when both switches (Same inputs I1, I2) are toggled off (construct a NOR Gate). Turn on a fourth light when either switch (Same inputs I1, I2) is toggled off (construct a NAND Gate). Print a copy of the program showing the construction of the four gate configurations. Also, submit a truth table for the four input configurations.
Then modify your program so, only one light turns on at a time as you toggle the four truth table states.
Scenario 2
Construct a seal-in circuit using a stop-and-start pushbutton and an internal coil to seal in. Turn on a light for 10 seconds when the start button is pushed then turn it off automatically or…
Create a PLC ladder logic diagram for an alarm that turns on when either A counts up to 10, or B counts down to 7.
ROBLEM:
Control 2 double acting cylinders using one push button for start and one push button for stop. The
repetitive cycle is as follows: Extend C1, after 5 seconds extend C2, after 5 seconds retract C1, after 5
seconds retract C2 All the process stops when the cycle repeats itself 5 times (counter) in a row. (Use
CTD counter)
I – Conduct the experiment with Codesys PLC module or online PLC simulator.
()
II- Simulate the process with I/O, and evaluate the outputs. ()
III- Make suitable connections for the pneumatic circuit and PLC, run the simulation and get the
output verified.
IV-Interpret the output of the PLC program with respect to its function.
Chapter 6 Solutions
Programmable Logic Controllers - With Access
Ch. 6 - Prob. 1RQCh. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - Prob. 5RQCh. 6 - Prob. 6RQCh. 6 - Prob. 7RQCh. 6 - Prob. 8RQCh. 6 - What do the abbreviations NO and NC represent when...Ch. 6 - Prob. 10RQ
Ch. 6 - Prob. 11RQCh. 6 - Prob. 12RQCh. 6 - Compare the operation of a photovoltaic solar cell...Ch. 6 - What are the two basic components of a...Ch. 6 - Prob. 15RQCh. 6 - Give an explanation of how a scanner and a decoder...Ch. 6 - Prob. 17RQCh. 6 - Prob. 18RQCh. 6 - Prob. 19RQCh. 6 - Prob. 20RQCh. 6 - Prob. 21RQCh. 6 - Prob. 22RQCh. 6 - Prob. 23RQCh. 6 - Prob. 24RQCh. 6 - Prob. 25RQCh. 6 - Prob. 26RQCh. 6 - Prob. 27RQCh. 6 - Prob. 28RQCh. 6 - Prob. 29RQCh. 6 - Prob. 30RQCh. 6 - Prob. 31RQCh. 6 - Prob. 32RQCh. 6 - Prob. 33RQCh. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Design a PLC program and prepare a typical I/O...Ch. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8P
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- Draw a plc ladder diagram for blinking lights with start and stop button. Please help me with this. Thank you in advanced.arrow_forwardConstruct a basic stop/start seal-in circuit. Energize an internal relay to seal-in (latch) the circuit. write the circuit in both Ladder Logic and Function Block Diagram (FBD). Hardware setup: Input 1 - Normally closed stop pushbutton, Input 2 - Normally open start pushbutton. Output 1 - A Red light to indicate the circuit is not energized. Output 2 - A Green light to indicate the circuit is energized. Label all inputs and outputs in the plc program. Write the program in both ladder and function block diagram (FBD).arrow_forwardDraw a ladder diagram in PLC programming for manually operated standing A+B+B-A- cylinder sequence.arrow_forward
- Design PLC controller to control the operation of beverage machine to choose pepsi, seven up or coca cola drinks using ladder diagram and functional block diagramarrow_forwardDevelop individual circuits and assembly code for the following scenarios: (12 points) (1) Using an LDR, turn the night lights automatically turn ON. (2) Sense the temperature using a sensor and turn ON the buzzer when the value is above a certain limit.arrow_forward5 lamps are lit at intervals of 2 seconds with the start button. When all 5 lamps are lit, it waits for 5 seconds and continues to light up with 2 second intervals from the 1st lamp. If sensor 1 is active while lamp 1 is on, lamp 3 will continue to operate as above, without lamp number 2 turning on. with stop buttonlamps will be turned off at any time.draw the plc ladder diagram accordingly.arrow_forward
- 1. Briefly describe the difference between the different types of counter modules used for PLCs. 2. Design a ladder logic program for a traffic light intersection. Use timers to control the duration of the green, yellow, and red lights for each direction.arrow_forwardMode 9 design asynchronous direct reset up counter circuit with T Type ffs(clock, negative edge trigger)arrow_forwardDraw a ladder logic diagram for the timer scenario shown.arrow_forward
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