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 7, Problem 6P
Program Plan Intro
Retentive Timer ON (RTO):
- RTO refers to an on-delay timer.
- RTO counts the time-based intervals as soon as the instruction becomes true.
- It retains the accumulated value as soon as instruction goes false or when power cycle occurs.
Explanation of Solution
b.
Required time:
- In “rung 2”and “rung 3”, the two RTO timers are interconnected.
- Here, the “present” value of “rung 2” is “2900” and the “present” value of “rung 3” is “1780”.
- Add these two present values to get the time required to produce the output.
- The sum of the two values is “4680”...
Explanation of Solution
c.
Conditions to be satisfied:
- The power required to be supplied to “L1” and close the input “PB1” contacts to turn the “rung 4” to “true”.
- Once, “PB1” becomes true, the “rung 2” star...
Explanation of Solution
d.
Status of the output:
- The RTO instruction used in the given diagram stores the timed count of timer and counts the time even if the power is lost or restored.
- The “rung 3” is required to activate the “DN” sign...
Explanation of Solution
e.
Result when PB2 is ON:
- If the input PB2 is “ON”, then the reset instructions of the timers “T4:1” and “T4:2” will make the “rung 1” as “true”...
Explanation of Solution
f.
Required accumulated time:
- The “rung 2” becomes “true” and the RTO instructions are started to execute when PB1 input contact is closed.
- The timer “T4:1” starts timing as long as the accumulated value attains the present value “2900”...
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Need help answering these questions!1. Design a While loop that lets the user enter a number. The number should be multiplied by 10, and the result stored in a variable named product. The loop should iterate as long as the product contains a value less than 100.
2. Design a For loop that displays the following set of numbers: 0, 10, 20, 30, 40, 50 . . . 1000
3. Convert the While loop in the following code to a Do-While loop:
Declare Integer x = 1
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Display "Enter a number."
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Need help with these:Design a While loop that lets the user enter a number. The number should be multiplied by 10, and the result stored in a variable named product. The loop should iterate as long as the product contains a value less than 100.
2. Design a For loop that displays the following set of numbers: 0, 10, 20, 30, 40, 50 . . . 1000
3. Convert the While loop in the following code to a Do-While loop:
Declare Integer x = 1
While x > 0
Display "Enter a number."
Input x
End While
Convert the While loop in the following code to a Do-While loop: Declare Integer x = 1 While x > 0 Display "Enter a number." Input x End While
Chapter 7 Solutions
Activities Manual For Programmable Logic Controllers
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