Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 6, Problem 2RQ
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Operating difference between a normally open and a normally closed relay contact:
| Normally open relay contact | Normally closed relay contact |
| Normally open relay contacts are said to be open when no current flows through the coil. | Normally closed relay contacts are said to be open when the coil is energized. |
| They are said to be closed when the coil is energized. | They are said to be closed when the coil is de-energized. |
| The relay contacts will be initially open to each other until the coil is energized or de-energized. It means that the movable contacts and fixed contacts will not be in any touch... |
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10. Consider you are interfacing a switch and two LEDS (L1 and L2) with LPC1769 MCU.
• When the switch is ON (logic HIGH), LI is ON, and L2 is OFF.
• When the switch is OFF (logic LOW), L1 is OFF, and L2 is ON.
• Switch is interfaced with port 1- pin 2, L1 with port 1- pin 3, and L2 with port 1- pin 4.
• Initially L1 is ON, and L2 is OFF.
Complete the C program template for this task given below. Demonstrate all steps: Pin function
configuration, mode selection, and writing/reading of pin values correctly.
#include
int main (void)
Here's a table showing the tco and tro for each of the components in the circuit bellow.
Please compute tco and tpo for the whole circuit?
tco
tPD
B
Inverter 0.1 ns 0.6 ns
AND2
0.4 ns 0.8 ns
C
XOR2
0.5 ns 1.8 ns
MUX2 0.5 ns 1.5 ns
Computer Science
Show the code required to configure the high part of port B (From the Atmega 328P) as inputs and the low part as outputs, and enable the pull-up resistors of the 2 most significant inputs.
Show the code sequence that configures port D as input and port B as output, and then transfers the port information to port B.
Chapter 6 Solutions
Programmable Logic Controllers
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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