7) Study the data transfer counter program of the figure below and answer the following questions: a. What determines the preset value of the counter? b. Outline the steps to follow to operate the program so that the PLI output is energized after 25 off-to-on transitions of the count PB input.
7) Study the data transfer counter program of the figure below and answer the following questions: a. What determines the preset value of the counter? b. Outline the steps to follow to operate the program so that the PLI output is energized after 25 off-to-on transitions of the count PB input.
Computer Networking: A Top-Down Approach (7th Edition)
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Chapter1: Computer Networks And The Internet
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
Transcribed Image Text:7) Study the data transfer counter program of the figure below and answer the following
questions:
a. What determines the preset value of the counter?
b. Outline the steps to follow to operate the program so that the PLI output is energized
after 25 off-to-on transitions of the count PB input.
Inputs
Ladder logic program
Output
L1
L2
Count PB
-CTU
COUNT UP
(cu)
(ON)
Count PB
PL1-
C5:1
000
000
Counter
Preset
Accumulated
O- Reset PB
MOV
MOVE
-N7:10
Source
N7:10
Destination C5:1.PRE
C5:1/DN
PL1
Reset PB
C5:1
(RES)
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