
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Please do not only give the step by step answer, but also give the actual ladder logic solution diagram for both acts. Software used is iTrilogi, but feel free to use any as long as it is applicable.

Transcribed Image Text:Exercise 4: iTrilogi Problems
Act 4.1
There are 4 given inputs: input 1, input 2, input 3, and input 4. The outputs are comprised of
output 1, output 2, and output 3 only. The 3 outputs should be off initially. If we were to press
input 1, this should cause output 1 to turn on, and should be remained on after releasing input 1.
Though, if any output is already on, even before pressing input 1, pressing it should have no
effect whatsoever. This behavior should be similar for input 2 and output 2, as well as input 3
and output 3. For input 4, it has a special case, it is used to turn off all the outputs. The outputs
should stay off when input 4 is pressed. Input 4 should be able to override all the inputs while
pressed.
Act 4.2
This time there are 4 inputs and 4 outputs. Each output, O(n), is activated if, and only if, at least
(n) inputs are clicked or pressed. The specific combination of buttons pressed does not affect
the output. For instance, clicking input 3 and input 4 should only activate output 1 and output 2.
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