EBK ACTIVITIES MANUAL FOR PROGRAMMABLE
5th Edition
ISBN: 8220102795983
Author: Petruzella
Publisher: YUZU
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Expert Solution & Answer
Chapter 8, Problem 2P
Explanation of Solution
a.
Status of output B3:0/9:
- Here, the input will be activated when the input push button is pressed down.
- A temporary signal will be provided by “B3:0/1” which will be resided for some time; this will generate the off-to-on transition signals...
Explanation of Solution
b.
Status of output B3:0/9:
- Here, the trigger signal will be turned OFF when the input push button is released; which makes “B3:0/1” to remain OFF.
- Here, the output “B3:0/9” is also in OFF state until the trigger is in the OFF state...
Expert Solution & Answer
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Students have asked these similar questions
Design a logic circuit that controls an elevator door in a three-story building.The circuit has four inputs. M is a logic signal that indicates when the elevator is moving (M=1) or stopped (M=0). F1, F2 and F3 are floor indicator signals. They go HIGH or 1 only when the elevator is positioned at the level of that particular floor. For an example, OPEN is HIGH when the elevator
is not moving (M=0) and lined up with the second floor, F2=1, while not lined up with others (F1=F3=0). Also remember that the elevator cannot be lined up with more than one floor at a time, as only one of the floor inputs can be HIGH at any given time.
Design a combinational circuit with four inputs— A, B, C, and D —and one output, F . F is to be equal to 1when A = 1, provided that B = 0, or when B = 1, provided that either C or D is also equal to 1. Otherwise,the output is to be equal to 0.1. Obtain the truth table of the circuit.2. Simplify the output function.3. Draw the logic diagram of the circuit, using NAND gates with a minimum number of ICs.4. Construct the circuit and test it for proper operation by verifying the given conditions.
3. Design a logic circuit that controls an elevator door in a three-story building. M is a logic signal
that indicates when the elevator is moving (M = 1) or stopped (M = 0). F1, F2, and F3 are floor
indicator signals that are normally LOW, and they go HIGH only when the elevator is positioned
at the level of that particular floor. For example, when the elevator is lined up level with the
second floor, F2 = 1 and F1 = F3 = 0. The circuit output is the OPEN signal, which is normally
LOW and will go HIGH when the elevator door is to be opened. We can fill in the truth table for
the OPEN output as follows:
a. Because the elevator cannot be lined up with more than one floor at a time, only one of
the floor inputs can be HIGH at any given time. This means that all those cases in the
truth table where more than one floor input is a 1 are don't-care conditions. We can
place an x in the OPEN output column for those eight cases where more than one F
input is 1.
b. Looking at the other eight…
Chapter 8 Solutions
EBK ACTIVITIES MANUAL FOR PROGRAMMABLE
Ch. 8 - Name the three forms of PLC counter instructions,...Ch. 8 - State four pieces of information usually...Ch. 8 - In a PLC counter instruction, what rule applies to...Ch. 8 - Prob. 4RQCh. 8 - When does the PLC counter instruction increment or...Ch. 8 - Prob. 6RQCh. 8 - Prob. 7RQCh. 8 - Prob. 8RQCh. 8 - Prob. 9RQCh. 8 - Prob. 10RQ
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