Activities Manual For Programmable Logic Controllers
5th Edition
ISBN: 9781259682476
Author: Frank Petruzella
Publisher: Mcgraw-hill Higher Education (us)
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Question
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...
Expert Solution & Answer
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Check out a sample textbook solutionStudents have asked these similar questions
Develop a PLC-based ladder logic program for automatic packaging system:
1.Draw and explain ladder logic diagram to run a conveyor motor using the following conditions:
a.AND Logic Function
b.NOR Logic Function
Analyze the following conditions:
a.Upgrade the ladder diagram such that the motor runs in both clockwise and anti-clockwise direction.
b.Use two light indicators to indicate the direction of motor rotation.
c.Use a photosensor to detect the package on the conveyor
d.Add start stop logic (Use both AND logic and OR logic, where necessary use switches to control the direction)
It will be drawn in the form of a PLC diagram and a solution will be reached.
1
Chapter 9 Solutions
Activities Manual For Programmable Logic Controllers
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Similar questions
- Discuss in detail the components of a PLC with suitable sketch.arrow_forwardPROGRAMMABLE LOGIC CONTROLLERSarrow_forward1Which of the statements below is true: Hard wired logic control is useful for mass production Hard wired logic control is faster than microprogram design. Hard wired logic control is easy to maintain and troubleshoot. iv. Hard wired control units are implemented through use of combinational logic units O a. ii, i and iv O biand O c.i i and lii Od.ifand iv.arrow_forward
- A PLC is used to control a single-axis robot, in which the axis is driven by a pneumatic cylinder. An output signal to the pneumatic cylinder causes it to extend (ON state). When there is no signal, the pneumatic cylinder retracts (OFF state). The gripper is an also driven by a pneumatic cylinder. The gripper open position is an OFF state and the closed position is an ON state. In order to perform a task, the following sequence of operations must be performed: TH Sequence No. Аxis Gripper OFF OFF 1 ON OFF ON ON 3 OFF ON 4 OFF OFF The process begins when the start bush button is ON and a part triggers a limit switch. For safety, an emergency switch is used to shut off the entire system. Design a PLC ladder diagram for this application.arrow_forwardPLCarrow_forwardWith the aid of Table-1 in the back of this exam paper, answer the following: a- Design the control signal and for the memory write operation. b- Draw the logic diagram of the control signal derived in (a).arrow_forward
- Design a PLC program and prepare a typical I/O connection diagram and ladder logic program for the following motor control specifications: • Three starters are to be wired so that each starter is operated from its own start/stop pushbutton station. • A master stop station is to be included that will trip out all starters when pushed.arrow_forward8.Calculate the degrees of freedom of the shown mechanismarrow_forwardA traffic light PLC program working with a screen will be installed. We will enter and adjust the intervals on the screen. (Red, green and yellow light flashing times). Put the every step's picture please.arrow_forward
- 1. Which of the statements below is true: Hard wired logic control is useful for mass production Hard wired logic control is faster than microprogram design. Hard wired logic control is easy to maintain ond troubleshoot, iv. Hard wired control units are implemented ihrough use of combinational logic units O a. i, ii and iv Obiand i O et iiand ii Oditand ivarrow_forward.............Control loop is a continuous cycle of the PLC reading Ladder Logic O Outputs Inputs Oarrow_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
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