Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 13, Problem 14P
The
- a. Examine the ladder logic and describe how the circuit would operate as programmed.
- b. Troubleshoot the program and identify what needs to be changed to have it operate properly.
Figure 13-39 Program for Problem 14.
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Problem 2: You are to design and simulate a sequential circuit which has two inputs, X and an enable
input, E. You will be using two JK Flip-Flops in your design. The following is the requirements for your
design:
When the circuit is disabled, i.e., E = 0:
There will be no change, that is, the circuit remains in the same state regardless of the value of X.
When the circuit is enabled, i.e., = 1:
If X = 1, the circuit goes through circular state transitions,
00 > 01 → 10 → 11 → 00
and repeats,
If X = 0, the circuit goes through circular state transitions,
00 > 11 → 10 → 01 → 00
and repeats,
Table 3
INPUTS
OUTPUTS
Y
F
A3. Connect the circuit shown in Fig. 4.2. Apply the inputs X and Y in Table 2 with data
switches. Monitor the output with the probe and record the output for each set of inputs in the
F column of Table 2.
1
1
1
1
A6. Construct the expression obtained in A4 by using only NAND gates. Draw and implement
the NAND gates connection diagram of the function. Record the output for each set of inputs
in the F column of Table 4. (Note that A+B = (A'.B')
F
F=
Fig. 4.2
Table 2
INPUTS
OUTPUT
Y
F
Table 4
1
INPUTS
OUTPUTS
1
F
1
1
1
A4. Express the function in Fig. 4.2 as a sum of minterms (sum-of-products) using Table 2.
1
1
F=
Questions (True or False):
# Question
1 All the logic functions can be implemented with only
NAND Gates.
(T/F)
2
A5. Draw the logic circuit of the expression obtained in A4 by using NOT, OR, AND gates.
B
Implement the logical circuit to monitor the output with a probe and record the output for each
set of inputs in the F column of Table 3.
1. Design a logic circuit that has 3 inputs A, B, and Cand one output F. The output of the circuit is to be F = 1if the number of
ones in input variables (ABC) is even, otherwise F=0. Construct the truth table.
2. Fnd the minterm expansion for the combinational circuit represented by the following truth table:
АВСЕ
0000
0011
0100
0111
1001
1011
1100
1111
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Chapter 13 Solutions
Programmable Logic Controllers
Ch. 13 - Prob. 1RQCh. 13 - Prob. 2RQCh. 13 - Prob. 3RQCh. 13 - List three potential noise-generating inductive...Ch. 13 - Prob. 5RQCh. 13 - Prob. 6RQCh. 13 - Prob. 7RQCh. 13 - Under what condition can a ground loop circuit be...Ch. 13 - Prob. 9RQCh. 13 - What operating state will cause an inductive load...
Ch. 13 - Prob. 11RQCh. 13 - Prob. 12RQCh. 13 - Prob. 13RQCh. 13 - Prob. 14RQCh. 13 - Prob. 15RQCh. 13 - List four uses for the data monitor function.Ch. 13 - Prob. 17RQCh. 13 - Prob. 18RQCh. 13 - Prob. 19RQCh. 13 - Prob. 20RQCh. 13 - Prob. 21RQCh. 13 - Prob. 22RQCh. 13 - Prob. 23RQCh. 13 - Prob. 24RQCh. 13 - Prob. 25RQCh. 13 - Prob. 26RQCh. 13 - Prob. 27RQCh. 13 - Prob. 28RQCh. 13 - Prob. 29RQCh. 13 - Prob. 30RQCh. 13 - Prob. 1PCh. 13 - A fuse is blown in an output module. Suggest two...Ch. 13 - Prob. 3PCh. 13 - Prob. 4PCh. 13 - Prob. 5PCh. 13 - Prob. 6PCh. 13 - A specific output is forced on, but the LED module...Ch. 13 - An electronic-based input sensor is wired to a...Ch. 13 - Prob. 9PCh. 13 - Prob. 11PCh. 13 - Prob. 12PCh. 13 - Prob. 13PCh. 13 - The program of Figure 13-39 is supposed to execute...
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