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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 security camera so let's look
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at the example first security camera
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recording When motion is detected a
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camera should start recording and
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continue for 25 seconds with that light
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should also get turned on with an
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interval of 2 seconds that means there
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is a sensor which detects the presence
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of someone which detects there is a
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motion so when there is a motion when
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motion is detected the camera gets on
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and it starts recording for 25
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seconds and with that the light will
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blink with the interval of 2 seconds
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that means light will turn on for 2
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seconds then turn off for 2 second then
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turn on for 2 seconds then turn off for
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2 seconds and it will repeat this
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process again and again so in this
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example we will use normally open
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contacts and normally close contact with
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that we will be also using uh some
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memory bits and we will also use some
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timers like TP and t r so let's move to
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TI portal where we will draw a ladder
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diagram for this example this is the
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interface of TI portal version 16
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firstly we need to go to PLC tags and
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then double click on default tag table
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so here we will add our inputs and
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outputs so the first input is the sensor
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which detects the presence of the motion
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or the presence of someone it detects
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the motion and then we have two outputs
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camera so it is an output so it's
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0.0 and then we have one more output
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that is the light that may be a
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bub and then after that we'll go to
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program blocks and then main
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ob1 so here we will draw the ladder
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diagram I will zoom into it and then I
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will add a normally open contact and
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then a coil this normally open contact
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will be for the sensor that detect the
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motion and then this output is a
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camera and then this camera should start
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recording for 25 seconds for that we
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will use a timer operation that is
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TP and the preset value for TP will be
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seconds and then I will insert a
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normally open contact in network 2
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and I will use this normally open
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contact as camera so it
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will so the camera represents an input
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so if camera turns on that is for 25
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second then the current will flow
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through through this for 25 seconds and
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then in that interval when a camera is
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on also the Light will turn
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on so the light will turn on but it
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remains on for only 2 seconds so for
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this we'll use a timer that is a TP and
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this TP the preset value for this will
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seconds and then this light should get
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off for 2 seconds then again remain off
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for 2 seconds and then again on for 2
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seconds so for that I will open the
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branch here add a coil and this coil
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will be a memory at say m
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0.0 and this m 0.0 should get on after
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every 2 seconds so the preset value for
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will be 2 seconds and then we will use a
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normally close contact here for
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light and then we will use one more
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normally open Clos contact here as M
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0.0 so this ladder diagram will make the
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the light for on for 2 seconds then off
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for 2 seconds and again on for 2 seconds
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again and again so for that period of
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time when the camera is on so it will
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blink for an inter for 25 seconds in
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total 2 seconds on 2 seconds off so now
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let's move to uh simulation here
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finish after that I will start
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monitoring before that I will start the
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CPU here and then start monitoring and
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then I will switch to the project view
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let's create a new project here
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then I will go to simulation tables and
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then simulation table
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one so here we need to right click here
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and then click on load project tags so
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here all are all the tags so we need
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to give it the motion by activating the
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sensor so when it gets activated the
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camera gets on and it starts recording
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for 25 seconds and in those 25 seconds
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and light gets on for 2 seconds off for
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2 seconds then again on for 2 seconds
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seconds so for 25 seconds camera remains
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on and also light blinks but after 25
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seconds both get stopped so the light
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got stopped and with that this camera
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also got stopped it stopped recording
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and it recorded for 25 seconds when
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sensor was activated it was all all
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about this example thank you for
