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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 be controlling two buzzers using
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So let's look at the example first.
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Example 10. If toggle switch one is on,
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then buzzer one and buzzer two will be
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on. If toggle switch one is off, then
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buzzer one and buzzer two will be still
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on. If toggle switch two is on, then
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buzzer one and buzzer two will be off.
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So for this example, we will be using
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normally open contacts, set coils and
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reset coils. So we will be using set
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coils to keep the buzzers on even when
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we turn off toggle switch one. and we
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will use reset coils to turn off the
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buzzers using toggle switch two.
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So let's move to cortices where we will
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draw a ladder diagram for this example.
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So I will open codices here.
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Firstly, we need to create a new
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project. Click here and then you can
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type the name of the project. Here we
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10. And we uh you can select template as
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standard project. You can also select
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the location where this file will be
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saved and then click on okay.
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After that we can select the device from
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this drop-own list and we can also
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select the PLC programming language.
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Let's keep it ladder logic diagram and
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And after that click here that is PLC
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programming. So here we will be drawing
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lighter diagram. So firstly we will
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insert a normally open contact for the
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toggle switch one. I will write toggle
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switch one. Enter. Okay.
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and then we insert two set coils. So
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here is the uh option to insert set
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coil. I will insert a set coil and then
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we need to insert one more set coil
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here. So I will insert branch below and
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insert one more set coil. So this set
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Okay. and second one second uh this set
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coil will be for buzzer two. Okay. So
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when toggle switch one is turned on the
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signal will pass through this. Okay. So
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buzzer one will turn on and also this
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buzzer two will be on.
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And then when we will turn off uh this
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this buzzer one and buzzer two will
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remain on. Why? Because we have used set
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coils instead of normal coils. So these
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set coils keep the output through even
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when the input is paused. So we need to
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turn on the input once and then the
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outputs will remain on even when we turn
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off the output. So for now when toggle
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switch one is turned on buzzer one and
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buzzer two gets on and when toggle
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switch one is turned off buzzer one and
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buzzer two remains on and then we need
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to turn off these two buzzers with one
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more toggle switch that is toggle switch
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two. For that we will insert one more
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network below this network.
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For that I will right click here and
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insert network below. And here we will
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insert a contact and normally open
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contact that will be for toggle
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switch to enter. Okay. And then we we uh
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we will insert two reset coils. one for
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buzzer one and other for buzzer two. So
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we will insert reset coils here. So here
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you can insert reset coils. Click here
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and then we need to insert branch and
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insert reset coil again to insert one
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more reset coil. So this will be buzzer
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and this will be buzzer two.
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So now when we will turn on the this
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toggle switch two this buzzer one will
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get off and also this buzzer two will
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also get off. So how so for buzzer one
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and buzzer two we have used reset coils.
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So these reset coils are used to turn
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off the outputs okay that are made on by
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the reset by the set coils. So here you
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can see buzzer one and buzzer two are
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are on and to turn them off we use these
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reset coils. Okay. So that is the these
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buzzer one and buzzer two are turned off
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by toggle switch two and by using these
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reset cos. Okay. So for now we will
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generate code here. Click here
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and after that we need to go to online
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and then we need to log in. Yes.
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And then we need to start.
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So for now both the toggle switches are
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off and you can see both the buzzers are
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also off. So buzzer one is false and
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buzzer two is also false. So to turn on
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buzzer one and buzzer two we need to
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turn on the toggle switch one. So
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initially the state uh the state of
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toggle switch one is false. We need to
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make it true. So we will click here. So
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you can see here it's true. But we need
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to go to debug and write values. You can
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see toggle switch one. The value of the
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toggle switch one is true. The state of
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the toggle switch one is true. And which
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this toggle switch one made this buzzer
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one and buzzer two true. Okay. So when
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we turn on this toggle switch one, it
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turned on buzzer one and buzzer two. And
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then we need to turn off this toggle
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switch one. We will change the state of
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this toggle switch one. So we will click
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here when false appears there and we
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will go to debug and write values. So
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now the state of the toggle switch one
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is false but buzzer one and buzzer two
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are still on are still true. Why?
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Because of the set coils we have used
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for buzzer one and buzzer two. So toggle
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switch one turn on buzzers and the set
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coils keep them through even when toggle
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switch one is turned off. So to turn off
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these buzzers we have one more toggle
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switch but with that we have used reset
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coils for these buzzers. So for that to
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turn off these buzzers we will uh we
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will turn on toggle switch two. So we
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need to make it true. I will click here.
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Uh the true appears here. And we will go
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to debug and write values. And you can
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see here when toggle switch two is true,
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buzzer one and buzzer two both of them
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gets false. Both them both of them turns
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off. It was all about this example.
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Thank you for watching.
