EBK LOGIXPRO PLC LAB MANUAL FOR PROGRAM
5th Edition
ISBN: 8220102803503
Author: Petruzella
Publisher: YUZU
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Question
Chapter 8, Problem 7P
Program Plan Intro
Count-Up (CTU) Counter:
- The CTU counter refers to an up counter
- This counter is used to count an event that occurs logically or externally and places that value in the counter’s accumulator.
- The accumulated value can even be maintained during false rung conditions and can be reset back to 0 using reset instruction.
Count-Down (CTD) Counter:
- The CTD counter refers to a down counter
- It decrements the accumulated value at each false-to-true transition and it also retains the accumulated value as soon as an on/off power cycle occurs.
Explanation of Solution
b.
Accumulated count of counter CTD:
- It is given that 20 on/off transitions occur at input “A” and 5 on/off transitions occur at input “B”.
- The CTU and CTD counters are addressed at the same location “C5:2”.
- The up-counter and down-counter operates simultaneously to increment and decrement the accumulated count value...
Explanation of Solution
c.
State of output A:
- Here, the accumulated count value of CTU counter is 15.
- The output “A” gets activated only when it receives CU signals from the counter “C5:2”.
- But, the preset value is set for 10...
Explanation of Solution
d.
State of output B:
- Here, the accumulated count value of CTD counter is 15.
- The output “B” gets activated only when it receives CD signals from the counter “C5:2”.
- But, the preset value is set for 10...
Explanation of Solution
e.
State of output C:
- Here, the accumulated count value of up/down counters is 15 and it is greater than the preset value 10 in the counters addressed at “C5:2’...
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Consider the following circuit.
a) Label it in such a way that the labels can be used to create a machine.
b) What will be the states of the machine? Show how these states are formed.
c) Give the formulas required to construct the machine.
d) What will be the output and the next state if the machine is run for the first time
and the input is 0?
AND
NAND
DELAY
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OR
only one of the following statements is false according to the Sequential circuit.
a.
it contains at least one memory element
b.
it can contain multiple combinational circuit
c.
The output states depend on present states
d.
All inputs and outputs are applied at the same time
Write a Verilog code with testbench for 16-bit up/down counter with
synchronous reset and synchronous up/down.
If up/down is set the counter is up counter and if it is not set, the
counter is a down counter.
clock
reset
Up/down
submit the module code, testbench code, and the simulation results.
Chapter 8 Solutions
EBK LOGIXPRO PLC LAB MANUAL FOR PROGRAM
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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