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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 industrial oven. So let's look
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at the example first.
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Industrial oven control.
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The oven should preheat for 10 seconds,
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then maintain the set temperature for 20
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seconds and then cool down for 30
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seconds. That means there's a button
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which starts the oven
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and there will be uh preheating for 10
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seconds and then after 10 seconds the
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oven will maintain the set temperature
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for 20 seconds and after 20 seconds it
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will cool down for 30 seconds.
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So for this example we will use normally
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open contacts as well as normally closed
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contacts. With that we will be also
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using some timers like TP and TR. So
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let's move to TI portal where we will
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draw a ladder diagram for this example.
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This is the interface of TI portal.
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Firstly, we'll go to PLC tags and then
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default tag table. So here we need to
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add our inputs and outputs. So firstly
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we have an input that is start button
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and then we have uh some outputs like
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as it is an output so its address will
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we have set temperature
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and then we have cooling.
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After that we'll go to program blocks
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So here we will draw the ladder diagram.
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I will zoom into it like this. So
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firstly I will insert a normally open
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contact that will represent the sl
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button and then uh we'll insert a coil
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that will represent preheating.
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So the process of preheat will go for 10
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seconds. So for that we will use a timer
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that is a TP. I will double on it and
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then okay. The preset value for
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preheating will be 10 seconds. So the
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process of preheating will go for 10
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and then I will open the branch
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and add a coil. So there will be one
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more process that is setting the
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required temperature. So this process
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after preheating. So there will be a
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delay of 10 seconds. So I will click on
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and then the preset value will be 10
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seconds. And then the process of setting
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the temperature will be for 20 seconds.
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For that we will use a timer that is TP
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and the preset value will be 20 seconds.
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After that there is one more process.
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For that I will open the branch here and
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add a coil. And this coil will represent
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one more process that is cooling.
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So this cooling process will go on after
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preheating and setting temperature. So
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there will be 10 and 20. In total there
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will be a delay of 30 seconds. For that
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we will use t on here
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and the preset value will be 30 seconds
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and after that the cooling process will
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go on and it will go on for 30 seconds.
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we will use a timer that is TP
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and the preset value for TP will be 30
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So when start button is pressed the
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process of preheating will go on for 10
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seconds and after 10 seconds it will
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maintain the set temperature and after
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maintaining the set temperature for 20
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seconds it will cool down and it will
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cool down for 30 seconds and after that
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I will we will start the simulation here
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After that we'll start CPU. Click on
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okay and then start monitoring.
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And after that we'll switch to project
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Let's create a new project here.
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After that I will click on the uh
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simulation tables and then simulation
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table one. Right click here and click on
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load project tax. So here we will uh
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press the start button. I will turn the
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start button on and then you can see the
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process of preheating has started and it
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will go on for 10 seconds.
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And after that preheating process
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stopped and maintaining the set
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temperature started and it will go on
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for 20 seconds. And after 20 seconds it
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will stop and the cooling process will
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After 20 seconds the cooling process has
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started and it will go on for 30
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seconds. After 30 seconds it will stop
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So as you can see here after 30 seconds
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28 29th 30 seconds cooling has also
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stopped. It was all about this example.
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Thank you for watching.
