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Hello everyone, welcome to automation
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community. Today in this video we are
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going to discuss an example in which we
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will use set coils. So let's start.
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Example seven. If toggle switch one is
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on then pump one and pump two will be
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If toggle switch one is off, then pump
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one and pump two will be still on.
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If toggle switch two is on, then palm 3
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and pump 4 will be on. If toggle switch
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two is off, then palm three and pal 4
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will be still on. So for this example,
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we will be using normally open contacts
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and set coils. So let's move to cortices
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where we will draw a ladder diagram for
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this example and also simulate it.
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I will open cortices.
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Let's create a new project.
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Keep the template as standard project
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Choose the PLC programming as ladder
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logic diagram and then click on okay or
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simply you can enter.
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Let's go to PLC programming here
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and we will draw the ladder diagram. So
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firstly I will insert a normally open
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contact here. And this will be toggle
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And when I turn on toggle switch one,
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LED one and LED 2 gets on. And when I
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turn it off, sorry, pump one and pump
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two gets on. And when I turn it off, two
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pumps will remain on. For that purpose,
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we'll use set coils instead of normal
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coils. So, this will be for pump one.
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Okay. And we need to add one more set
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coil here. So, we will insert a branch
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here and add a set coil. So, this will
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So let's simulate it. First we will go
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to we will you know generate code here.
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Go to online and uh start simulation.
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And then start. As you can see here when
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toggle switch one is off both the pumps
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are off. So when I turn on this toggle
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switch one let's debug it
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right values and pump one and pump two
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both gets on and when the toggle switch
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is turned off when the state of toggle
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switch is turned to false firstly we
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need to debug it and write values the
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two pumps will remain on
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and now let's keep them false for Now
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we'll stop simulation, log out and stop
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And now we will insert one more network
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here for toggle switch two.
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We'll insert a normally open contact
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and this will be toggle
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Okay. And then we will add two set
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coils. This will be for pump
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Okay. And we need to add one more pump
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here. So we will insert branch
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and add a set coil. And this set coil
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will be for pump four.
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Okay. So what happens is that when
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toggle switch two gets on, signal will
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pass through this. As a result, this
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palm 3 and pal four gets on. And when
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toggle switch two gets off, these palm 3
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and pal 4 remains on because we have
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used a set coil here. So, so the set
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remains on when the input gets on and
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after that uh when input gets off it
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remains on the output remains on. So now
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and start simulation and then we will
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and start by clicking here.
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So when toggle switch one is turned on
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let's debug right values pump one and
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pump two gets on. And when I turn off
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toggle switch one debug it right values
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pump one and pump two remains on. Why it
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remains on? Because we have used set
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coils instead of normal coils. So so
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these set coils on getting the signal
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maintains its state as true even if the
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Similarly when I turn on switch two that
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is toggle switch two when I turn on
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toggle switch two let's debug it
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right values pump three and pump four
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gets on and when I turn off this uh
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two these pumps still remain on it is
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because of the set coils we have used
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here these set coils keep the output as
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true even if this input is false. But
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here we need to turn on the input once
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and then when we turn those inputs off
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the outputs remain true. It was all
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about this example. Thank you for
