Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 14, Problem 3P
How would an on/off controller respond if the deadband were too narrow?
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Feedback from sensors or switches is the separation of controller and process
true O
False
A home security system has a master switch that is used to enable an alarm, lights, video cameras, and a call to local
police in the event one or more of six sets of sensors detects an intrusion.
In addition there are separate switches to enable and disable the alarm, lights,
and the call to local police. The inputs, outputs, and operation of the enabling logic are specified as follows:
Inputs:
S: signals from six sensor sets (8 =
M: master switch (0 = security system enabled, 1 = security system disabled)
A: alarm switch (0 = alarm disabled, 1 = alarm enabled)
L: light switch (0 = lights disabled, 1 = lights enabled)
P: police switch (0 = police call disabled, 1 = police call enabled)
intrusion detected from the sensors, 1 = no intrusion detected)
Outputs:
A: alarm (e = alarm on, 1 = alarm off)
L: lights (0 - lights on, 1 - lights off)
V: video cameras (0 = video cameras off, 1 = video cameras on)
C: call to police (8 = call off, 1 = call on)
Operation:
If one or more of the sets of…
Chapter 14 Solutions
Programmable Logic Controllers
Ch. 14 - Compare continuous and batch processes.Ch. 14 - Prob. 2RQCh. 14 - State the basic function of each of the following...Ch. 14 - State the purpose of each of the following types...Ch. 14 - Prob. 5RQCh. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Prob. 8RQCh. 14 - Prob. 9RQCh. 14 - Prob. 10RQ
Ch. 14 - Prob. 11RQCh. 14 - What term of a PID control is designed to...Ch. 14 - Prob. 13RQCh. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - Prob. 16RQCh. 14 - Prob. 17RQCh. 14 - Prob. 18RQCh. 14 - Prob. 19RQCh. 14 - List four types of communication tasks provided by...Ch. 14 - Prob. 21RQCh. 14 - What are the three general levels of functionality...Ch. 14 - Prob. 23RQCh. 14 - Prob. 24RQCh. 14 - Compare device and process bus networks.Ch. 14 - Prob. 26RQCh. 14 - Prob. 27RQCh. 14 - Prob. 28RQCh. 14 - Prob. 29RQCh. 14 - Summarize the collision detection network access...Ch. 14 - Prob. 31RQCh. 14 - Prob. 32RQCh. 14 - Prob. 33RQCh. 14 - Prob. 34RQCh. 14 - Prob. 35RQCh. 14 - Prob. 36RQCh. 14 - Prob. 37RQCh. 14 - Prob. 38RQCh. 14 - Prob. 39RQCh. 14 - Explain how redundant media works.Ch. 14 - Prob. 41RQCh. 14 - Prob. 42RQCh. 14 - Prob. 43RQCh. 14 - Prob. 44RQCh. 14 - Summarize the two main functions of a SCADA...Ch. 14 - Prob. 46RQCh. 14 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - How would an on/off controller respond if the...Ch. 14 - In a home heating system with on/off control, what...Ch. 14 - a. Calculate the proportional band of a...Ch. 14 - Prob. 6PCh. 14 - Prob. 7PCh. 14 - Prob. 8P
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