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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 four solenoids using
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two switches. So let's look at the
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Example nine. If toggle switch one is on
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then solenoid one and solenoid 2 will be
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on. If toggle switch one is off, then
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solenoid one will be off and solenoid 2
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will be on. If toggle switch two is on
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then solenoid 3 and solenoid 4 will be
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on. If toggle switch 2 is off then
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solenoid 3 will be off and solenoid 4
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will be on. That means when to switch
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one is turned on both the solenoids turn
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on and when it is turned off one
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solenoid will turn off but the other
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solenoid will remain on. Similarly when
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toggle switch two is turned on both the
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solenoid soilite 3 and solenoide 4 both
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turn on and when switch is turned off
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one solenoid turns off but the second
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solenoid remains on. So for this example
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we will be using normally open contacts
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and coils with that we will be also
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implementing lateral. So let's move to
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codicuses where we will draw a ladder
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diagram for this example and also we
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will do it simulation.
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So I will open cortices.
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Let's create a new project here. You can
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uh select template as standard project.
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You can rename the rename here as
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you can also select the location of the
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file and then click on okay.
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you need to uh uh select the PLC
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programming. Keep it ladder logic
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diagram and click on open.
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Go to PLC program. So here we will draw
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So firstly we will insert a normally
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open contact. It will be for toggle.
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switch one and then we will insert a
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coil here for solenoid one. So this will
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be solenoid one. Okay.
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So when toggle switch one when we will
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turn it on solenoid one gets on and when
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we will turn it off solenoid one gets
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on. And then let's insert network below
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this and you insert a normally open
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And this normally open contact will be
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again toggle switch one
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and then we will insert a coil and this
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coil will be solenoid
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And after that when toggle switch one is
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turned on both the solenoid gets on it's
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okay. But when toggle switch one is
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turned off both the solenoids gets off
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but only solenoid one should turn off
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and this solenoid 2 should remain on.
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For that we will implement latching
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here. So we will insert branch here or
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we can simply add a normally open
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contact parallel. So we will insert a
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normally open contact here at parall to
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this toggle switch one and we will give
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the tag to this normally open contact
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same as solenoid 2. So this will be
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2. So in this way we have done latching.
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So when toggle switch one is turned off.
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Solenoi 2 remains on. Similarly, we will
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insert one more network here
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and we will insert a normally open
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contact and a coil. This normally open
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contact will be toggle
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Okay. And this coil will be solenoid 3.
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Solenoid 3. So when toggle switch two is
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turned on solenoid 3 get on and with
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that solenoid 4 should also get on. So
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for that we will insert one more network
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and add a normally open contact and a
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coil. So this normally open contact will
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and this will be this coil will be
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Okay. So when toggle switch 2 is turned
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on, solenoid 3 and solenoid 4 both gets
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on and when toggle switch 2 is turned
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off solenoid 3 should get off but solid
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4 should remain on but for now solenite
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4 gets off. So to keep it on even when
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we turn off uh this toggle switch two we
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will implement latching. So with a
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toggle switch two we will insert a
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contact parall to it. So in this way we
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have inserted a normally open contact
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parall to this toggle switch two and we
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will tag this normally open contact same
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as this solenoid 4. So it is solenoid 4.
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So in this way we have implemented
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latching here. So when toggle switch two
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is turned off solenoid 4 remains on.
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So when toggle switch one is turned on
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the signal will pass through this
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solenoid one gets on. Similarly, the
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signal will also pass through this as
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solenoid 2 gets on. And then when toggle
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switch one is turned off, the signal
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will not pass through this as this is a
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normally open contact. So solenoid one
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gets off. Similarly, the signal will not
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pass through this toggle switch one. But
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we have large solenoid 2 here. So on
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turning off this toggle switch one, the
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signal will not pass through this, but
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it will pass through this contact. So
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the soil knight 2 remains on. Similarly
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when toggle switch two is turned on the
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signal passes through this soil 3 gets
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on and also the signal passes through
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this contact as well the so four gets
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on. And when toggle switch two is turned
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off the signal will not pass through
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this. As a result the solenite 3 turns
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off. But due to latching the signal will
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pass through this and keep the solid 4
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on even when we turn off this toggle
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switch too. For now we will generate
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Go to online and start simulation.
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And then start. As you can see here all
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all the solenoids are off.
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because all the toggle switches are off.
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Both the toggle switches are off. So
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firstly we will click here make it true
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and then go to debug and write values.
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As you can see here when we turn on this
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toggle switch solenoid one and solenoid
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2 both the solenoides turn on. You can
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see here the signal passes through this
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as well as this and makes these two
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solenoides on. And when I turn off this
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toggle switch one, I click here make it
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false and then go to debug and write
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values. You can see here the signal does
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not pass through this. As a result, the
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solenoid one gets off. Similarly, this
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toggle switch one does not allow signal
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to pass through this. But the signal
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passes through this contact which is a
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solenoid I2 and which keeps the soleno
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I2 on even when we turn off this toggle
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switch one. Similarly when we turn on
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toggle switch two click here make it
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true then go to uh go to debug and write
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values. You can see here solenoid 3 and
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solenoid 4 both are on. And when we turn
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it off, make it false. Go to debug and
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write values. So 93 turns off. But so 94
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remains on. It remains on due to the
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latching here. We have use this normally
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open contact same as output. So the
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signal passes through this and keeps
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this solite for on even when we turn off
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this toggle switch too. It was all about
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this example. Thank you for watching.
