Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 13, Problem 13P
Program Plan Intro
Suspend (SUS) instruction:
- The SUS instruction refers to a diagnostic instruction.
- It is used to trap and identify specific conditions for
program debugging as well as for system troubleshooting. - It is also used to diagnose the ladder logic program for trouble shooting by placing the controller in suspend or idle mode.
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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 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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