Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Concept explainers
Question
Chapter 9, Problem 13RQ
Program Plan Intro
Pushbutton:
- It refers to a normal switch process that is used to control some aspects of machine or process.
- Pushbuttons are normally built of hard materials such as plastic or metal.
- Pushbuttons are normally used in calculators, kitchen appliances, and various other
mechanical and electronic devices.
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Students have asked these similar questions
* In the figure attached, the output voltage (Vout) will not equal to zero when the
:switch is
t = 0
R
www
VS
Vout
Closed at Zero
Opened at zero
Open
Closed
Purpose:
The entry/Exit of the parking lot is a single lane passage. By controlling the indicators, the program ensures that only one car can pass
through the Entry/Exit so as to prevent car accident between entering and leaving cars.
Y1
X1
Program Description:
In the parking lot, there are two light indicators individually directing the entering and leaving cars. By the interlock control circuit, only
one indicator will show "GO" signal and the car accident will thus be prevented.
When an
the same time, the leaving car indicator will show "STOP". Car entering is allowed but leaving is prohibited in this case.
When a leaving car draws near the vehicle control barrier, X1 will be ON and so will Y1. The leaving car indicator will show "GO" and the
entering car indicator will show "STOP"|
draws near the vehicle control barrier, XO will be ON and so will YO. The entering car indicator will show "GO". At
TOP
GO
Arduino programming exercises using Uno Microcontroller
Write a program that lights a green LED attached to pin 3. The green LED should turn off after a button attached to pin 4 has been pushed and released 3 times. Each time the button is pushed it will turn on a red LED attached to pin 7 and turn off a yellow LED attached to pin 9. When the button is not pushed the red LED will be off and the yellow LED will turn on. Assume the button is wired active low.
Turn on green LED
Leave it on
Turn on yellow LED
Leave it on
Check the state of the button
If the button is pressed
Add 1 to a counter variable
Turn off yellow LED
Turn on red LED
After the button is pressed, turn on yellow LED, turn off red LED
If the counter is 3 or more (>2)
Turn off green LED
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- A press's machine cycle is as follows: ;Lowering the ram: the ram is lowered when 0 The safety screen was open before the cycle began and is now closed (limit switches S4 and S5 actuated) The press is in the home, i.e. upper position (limit switch S6 actuated) Two-hand switches S1 and S2 were not actuated prior to the cycle but are now . Halting the ram during lowering: the ram stops 0 ;immediately when One of the two-hand switches is released. Or . . The safety screen is opened. Or .The ram is down (limit switch S3 actuated) Raising the ram: If the ram is down (limit switch S3 actuated), it is raised by the eccentric drive. The safety .screen can be opened and both two-hand switches released The machining cycle is completed when the ram reaches the home position (limit switch S6 actuated) The designer needs for ........conditional output boxes for drawing the ASM-chart for the controller of the aforementioned system 0 C O O O O O Oarrow_forwardComputer Science Build an Arduino system that displays the current temperature in Celsius degree and light intensity on LCD and Use potentiometer to control the brightness of the LCD.arrow_forwardA press's machine cycle is as follows: ;Lowering the ram: the ram is lowered when The safety screen was open before the cycle began and is now closed (limit switches S4 and S5 actuated) The press is in the home, i.e. upper position (limit switch .S6 actuated) Two-hand switches S1 and S2 were not actuated prior to .the cycle but are now Halting the ram during lowering: the ram stops ;immediately when One of the two-hand switches is released. Or The safety screen is opened. Or .The ram is down (limit switch S3 actuated) Raising the ram: If the ram is down (limit switch S3 风 actuated), it is raised by the eccentric drive. The safety .screen can be opened and both two-hand switches released The machining cycle is completed when the ram reaches the .home position (limit switch S6 actuated) The designer needs for ****** state boxes for drawing the ASM-chart for the controller of the aforementioned system 6 7 9 10 8 5arrow_forward
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