Most Asked PLC Ladder Logic Question and Why

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One of the most common and foundational
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examples of latter logic programming
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involves designing a motor start stop
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circuit that utilizes latching or CLIN
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logic. This specific scenario not only
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serves as a practical exercise but also
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encapsulates several critical principles
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of programmable logic controller PLC
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programming as well as the broader realm
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of industrial control systems. By
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exploring this example, we can gain
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insights into circuit design, relay
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actuation, and the mechanisms that
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enable machinery to operate efficiently
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and safely. Detailed information
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contained in this video can be found at
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acccca.ca.
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A link has been put in the description
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below. If you have not watched the other
0:43
videos yet, there will be links in the
0:45
description below that will start you at
0:46
video one. There will be links to the
0:49
rest of the videos in this series as
0:50
well. Why is this question so common?
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shows the cyclical scan of the PLC. The
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reason that the inputs and outputs are
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activated or deactivated in the program
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is because of the PLC scans cyclical
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nature which continuously updates the
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inputs and outputs. It demonstrates
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basic logic utilizing a simple
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combination of and and or operations
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which are fundamental to most ladder
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diagrams.
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Introducing latching. The seal in
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circuit utilizes the motor's output
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contact to maintain the circuit flow
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after the start button is released. This
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concept is fundamental in
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differentiating PLC logic from a simple
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momentary switch. Tests the knowledge of
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contacts requiring both normally open
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for the start button and sealin and
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normally closed for the stop and/or
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emergency button contacts. If you are
1:40
enjoying this video, please hit the like
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button below. Keeping up with all the
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latest automation innovations can be
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difficult, so hit the subscribe button.
1:48
Remember to hit the bell beside your
1:50
subscription to receive the
1:51
notifications. The safety component is
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vital. A normally closed button, which
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is wired in series with the start logic,
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serves as an essential safety feature by
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breaking the circuit when the button is
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pressed. This design also highlights the
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importance of failsafe principles. If a
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wire connected to the normally closed
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stop button breaks, the motor will shut
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down automatically. The question can be
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made more complex by adding additional
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requirements such as including a timer,
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a counter or an alarm light. But the
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fundamental start stop circuit remains
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the most frequent starting point for
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latter logic examples. To see how we
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incorporate a jog into this circuit,
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click here. Click here to learn how you
2:28
can learn PLC programming easily with
2:30
the machine simulator by Nertk.
2:34
[Music]

Most Asked PLC Ladder Logic Question and Why

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Most Asked PLC Ladder Logic Question and Why

accautomation.ca