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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 which will
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be about home and parking lights so
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let's look at the example first home and
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parking lights when the lights are
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turned off in a building an exit door
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light remain on for 15 seconds after
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that the parking lot light gets on until
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parking so for this example we will use
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normally open contacts as well as
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normally closed contacts with that we
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will be also using negated
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coils and some timers like TP so let's
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move to TI portal where we will draw a l
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example this is the interface of di
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firstly we will go to PLC tags and then
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table so here we need to add our inputs
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outputs so firstly there will be a start
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button that will start the whole process
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have for example we have four rooms in
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the building so there will be light
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two light three Suppose there are three
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lights and then we have one more that is
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light as these are output so its address
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then we have one more output that is
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light and then we have one more input
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that is a sensor which detects the
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presence of light in uh presence of car
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in the parking so it is an output so its
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after that we'll go to program blocks
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ob1 so here we will be drawing lat
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example so I will zoom into it like this
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so firstly we will use a normally open
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contact for the start
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button and then I will insert a Quil
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that will be used as a memory bit so it
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will be m0 0 and then I will open the
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branch here at a normally open contact
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and then close so we are latching this m
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0.0 here so the start button is a push
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button so when it is spash and release
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this m 0.0 gets through and when M 0.0
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gets through and lights saw button is
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pressed so M 0.0 that means start button
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is being pressed and released
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then the lights off button when pressed
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when turned on all the lights will turn
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use nug gated contacts
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here open the branch add a coil open the
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branch add a coil open the
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coils for light one light two light
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four so this will be light one and then
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this will be Light 2 and this will be
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three and then this Quil will be for
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lights and this exit light will turn on
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for 15 seconds so for that we will use a
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timer operation and that will be
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TP and this uh the Pressed value for
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seconds after that we will use one more
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normally open contact for m0 in network
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3 m 0.0 and then when exit lights are
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activated that means there is the there
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parking so when it gets activated
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then and uh the lights so button is
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pressed then the parking lights will be
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on so this will be parking light parking
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light so we will start the simulation
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and during the simulation we will learn
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how this later logic will work
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finish after that I will start
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monitoring after that I will switch to
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view where we need to create a new
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project let's create a new project here
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after that let's go to simulation tables
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and then simulation table
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one so I will WR click here and click on
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taxs so as we can see
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here initially light one light two and
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light three is on and
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then we will turn on the start button I
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will turn it on press and release it and
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then when lights saw button is pressed
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all the lights gets off and with that
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the exit light will turn on for 15
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seconds and when the exit light gets
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off gets off and there is a car there is
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car in the parking so this sensor is
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also activated then the parking light
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will turn on and it will remain on until
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the car gets out of the parking so when
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the car gets out of the parking the
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sensor gets deactivated so the sensor
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got deactivated and the parking lights
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again turned off it was all about this
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example thank you for watching
