Programmable Logic Controllers - With Access
5th Edition
ISBN: 9781259933523
Author: Petruzella
Publisher: MCG
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Chapter 9, Problem 8RQ
Program Plan Intro
a.
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.
Explanation of Solution
b.
Practical uses for forcing functions:
- The force functions available in PLCs are used to accomplish forcing.
- Force function refers to a manual control function that is capable of overriding the current status of I/O from keyboard...
Explanation of Solution
c.
Need to exercise extreme care:
- Extreme care must be taken while using forcing function because incorrect usage of forcing functions can cause damage to both equipment and people surrounding the equipment...
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Discuss in detail the components of a PLC with suitable sketch.
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Chapter 9 Solutions
Programmable Logic Controllers - With Access
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Similar questions
- Explain the functionality of set and reset instruction in PLC program. Sketch theexample of these functions .arrow_forwardROBLEM: 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.arrow_forward1. Create a Ladder logic using below instruction -Function: A start, and a stop button is used for starting and stopping a motor. But makesure that the buttons can only start and stop the motor on a positive or rising edge.2. Briefly explain how the traffic light are working using PLC Program for Traffic LightControl. Include a diagram to your explanation.arrow_forward
- What are some good and bad applications of PLCs?arrow_forwardDescribe the function and connection of the internal registers of the PLC. What parameters are relevant in the development of a PLC program? What requirements would you place on an integrated program development environment.arrow_forwardExplain the general structure of programmable controllers (PLC) by drawing figures. Write the names of the control elements to be connected to the input and output parts of the PLC. (Please type with keyboard so that I can understand.Thanks)arrow_forward
- Construct 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_forwardIt will be drawn in the form of a PLC diagram and a solution will be reached.arrow_forwardUsing CODESYS create a PLC LADDER LOGICarrow_forward
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