Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 13, Problem 29RQ
Program Plan Intro
Programmable Logic Controller (PLC):
- Programmable Logic Controller (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.
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Students have asked these similar questions
1- Write a PLC ladder program to implement the process illustrated in Figure.
2- Indicate all the input and output field devices in their un-actuated conditions with symbolic addresses.
The sequence of operation requires that:
Normally open start push button and normally closed stop push button station is used to start and stop the
process.
When the process starts, the tank is empty and solenoid A energizes to start filling the tank with liquid.
As the tank fills, the Empty sensor switch closes.
When the tank is half full, the Mid-full level sensor switch closes and the motor starts running to mix the
liquid.
When the tank is full, the Full level sensor switch closes momentarily so that:
a- The motor stops.
b- Solenoid A is de-energized.
c- Solenoid B is energized to empty the tank.
When the tank is completely empty, the Empty sensor switch opens to de-energize solenoid B.
The start button is pressed to repeat the sequence.
SOL A
Motor
Full level
sensor
switch
Mid-Full
level
sensor…
1- Write a PLC ladder program to implement the process illustrated in Figure.
2- Indicate all the input and output field devices in their un-actuated conditions with
symbolic addresses.
The sequence of operation requires that:
A start/stop pushbutton station is used to start and
When the process starts, the tank is empty and solenoid A energizes to start filling the tank
with liquid.
As the tank fills, the Empty sensor switch closes.
When the tank is half full, the Mid-full level sensor switch closes and the motor starts
running to mix the liquid.
When the tank is full, the Full level sensor switch closes momentarily so that:
stop
the process.
a- The motor stops.
b- Solenoid A is de-energized.
c- Solenoid B is energized to empty the tank.
When the tank is completely empty, the Empty sensor switch opens to de-energize
solenoid B.
The start button is pressed to repeat the sequence.
out Puts
SOL A
oulput
Motor
Infut
Full level
sensor
switch
Mid-Full
level
Empty
sensor
sensor
switch
switch…
1- Write a PLC ladder program to implement the process illustrated in Figure.
2- Indicate all the input and output field devices in their un-actuated conditions with symbolic addresses.
Chapter 13 Solutions
Programmable Logic Controllers
Ch. 13 - Prob. 1RQCh. 13 - Prob. 2RQCh. 13 - Prob. 3RQCh. 13 - List three potential noise-generating inductive...Ch. 13 - Prob. 5RQCh. 13 - Prob. 6RQCh. 13 - Prob. 7RQCh. 13 - Under what condition can a ground loop circuit be...Ch. 13 - Prob. 9RQCh. 13 - What operating state will cause an inductive load...
Ch. 13 - Prob. 11RQCh. 13 - Prob. 12RQCh. 13 - Prob. 13RQCh. 13 - Prob. 14RQCh. 13 - Prob. 15RQCh. 13 - List four uses for the data monitor function.Ch. 13 - Prob. 17RQCh. 13 - Prob. 18RQCh. 13 - Prob. 19RQCh. 13 - Prob. 20RQCh. 13 - Prob. 21RQCh. 13 - Prob. 22RQCh. 13 - Prob. 23RQCh. 13 - Prob. 24RQCh. 13 - Prob. 25RQCh. 13 - Prob. 26RQCh. 13 - Prob. 27RQCh. 13 - Prob. 28RQCh. 13 - Prob. 29RQCh. 13 - Prob. 30RQCh. 13 - Prob. 1PCh. 13 - A fuse is blown in an output module. Suggest two...Ch. 13 - Prob. 3PCh. 13 - Prob. 4PCh. 13 - Prob. 5PCh. 13 - Prob. 6PCh. 13 - A specific output is forced on, but the LED module...Ch. 13 - An electronic-based input sensor is wired to a...Ch. 13 - Prob. 9PCh. 13 - Prob. 11PCh. 13 - Prob. 12PCh. 13 - Prob. 13PCh. 13 - The program of Figure 13-39 is supposed to execute...
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