EBK ACTIVITIES MANUAL FOR PROGRAMMABLE
5th Edition
ISBN: 8220102795983
Author: Petruzella
Publisher: YUZU
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Chapter 6, Problem 3P
Program Plan Intro
Ladder logic program:
The above ladder logic program includes three inputs namely, I/1, I/2 and I/3, three rungs namely, Rung 1, Rung 2 and Rung 3, two pilot lights namely, PL1 and PL2 and two outputs namely, O/9 and O/10.
Explanation of Solution
b.
Condition for unlatch rung 2:
- When the input I/3 is set as true or ON state, the unlatch rung 2 is termed as active or in true state...
Explanation of Solution
c.
Condition for rung 3:
- When the input O/9 in Rung 3 is set as zero or low, the rung 3 is termed as active.
- When the input I/3 in Rung 2 is set as true, the output of Rung 2 will be reset as zero...
Explanation of Solution
d.
State of Pilot Light PL1:
- The ON state of pilot light PL1 represents that the output bit O/9 is in high state.
- This can be occurred when the relay in latched state is set to the bit 1...
Explanation of Solution
e.
State of Pilot Light PL2:
- The ON state of pilot light PL2 represents that the input bit I/3 is true in Rung 2...
Explanation of Solution
f.
Pilot Light used when the power is restored:
AC power is removed and restored through the circuit, the relay retains to its original state, n...
Explanation of Solution
g.
Inputs required for unlatched state:
- The relay is in latched state and the inputs I/1, I/2 and I/3 are false.
- To convert the relay state from latched to unlatched,...
Explanation of Solution
h.
State of the relay:
- The Programmable Logic Controller (PLC) executes the instructions according to top to bottom approach.
- When the closed instructions at I/1, I/2 and I/3 are termed...
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2. Signed Integers
Unsigned binary numbers work for natural numbers, but many calculations use negative
numbers as well. To deal with this, a number of different methods have been used to represent
signed numbers, but we will focus on two's complement, as it is the standard solution for
representing signed integers.
2.1 Two's complement
• Most significant bit has a negative value, all others are positive. So, the value of an n-digit
-2
two's complement number can be written as: Σ2 2¹ di 2n-1 dn
• Otherwise exactly the same as unsigned integers.
i=0
-
• A neat trick for flipping the sign of a two's complement number: flip all the bits (0 becomes 1,
or 1 becomes 0) and then add 1 to the least significant bit.
• Addition is exactly the same as with an unsigned number.
2.2 Exercises
For questions 1-3, answer each one for the case of a two's complement number and an
unsigned number, indicating if it cannot be answered with a specific representation.
1. (15 pts) What is the largest integer…
Chapter 6 Solutions
EBK ACTIVITIES MANUAL FOR PROGRAMMABLE
Ch. 6 - Prob. 1RQCh. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - Prob. 5RQCh. 6 - Prob. 6RQCh. 6 - Prob. 7RQCh. 6 - Prob. 8RQCh. 6 - What do the abbreviations NO and NC represent when...Ch. 6 - Prob. 10RQ
Ch. 6 - Prob. 11RQCh. 6 - Prob. 12RQCh. 6 - Compare the operation of a photovoltaic solar cell...Ch. 6 - What are the two basic components of a...Ch. 6 - Prob. 15RQCh. 6 - Give an explanation of how a scanner and a decoder...Ch. 6 - Prob. 17RQCh. 6 - Prob. 18RQCh. 6 - Prob. 19RQCh. 6 - Prob. 20RQCh. 6 - Prob. 21RQCh. 6 - Prob. 22RQCh. 6 - Prob. 23RQCh. 6 - Prob. 24RQCh. 6 - Prob. 25RQCh. 6 - Prob. 26RQCh. 6 - Prob. 27RQCh. 6 - Prob. 28RQCh. 6 - Prob. 29RQCh. 6 - Prob. 30RQCh. 6 - Prob. 31RQCh. 6 - Prob. 32RQCh. 6 - Prob. 33RQCh. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Design a PLC program and prepare a typical I/O...Ch. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8P
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