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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 level control so let's look at
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first level control if the lowlevel
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sensor detects that the tank is low then
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the pump will run for 20 seconds if the
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high level sensor detects that the tank
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is full the pump should stop for 30
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second so for this example we will use
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normally open contacts and normally
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closed contacts we will be also using a
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timer known as pulse timer TP and we
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will also use a memory bit so let's move
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to TI portal where we will draw a l
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diagram for this level control
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example this is the interface of TI
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portal version 16 firstly we need to go
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to PLC tags PLC tags and then here
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table here we need to add our inputs and
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outputs so we have two
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sensor that is the sensor that detects
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the level of the tank is low and then we
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have one more sensor output uh sorry
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sensor it is a sensor that detects the
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level of the of the uh system is high
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and then we have an output that is a
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pump so it is an output so its address
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0.0 so here we have added our inputs and
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outputs after that we will go to program
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blocks and then Main ob1
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so here we will draw the ladder diagram
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I will minimize this and then zoom into
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it so firstly I will insert a normally
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open contact and then a
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coil this normally open contact will be
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for lowlevel sensor so I will write
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L and select low level sensor and the
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palum so I will write p and select pump
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list so when lowlevel sensor detects the
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level of the tank is low then this pump
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will turn on and this pump should turn
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seconds so I will insert a timer here
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timer operations and then
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TP and then I will click on okay so this
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pump should remain on for 20 seconds so
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here we will write 30 s that is 30
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seconds and we have one more sensor that
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detects the level of the tank that is a
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high level sensor so I will insert a
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normally open contact and a
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coil so this normally open contact it
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represents the high level sensor so I
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will write H and select high level
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coil which gets on when high level
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sensor detect the level is high so after
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that the pump should turn off so for
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that we will use a memory bit here so
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and this pump should remain off for 30
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seconds so this m 0.0 should uh remain
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on for only 30 seconds so for
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that I will insert a timer here that is
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a TP and the preset value will be
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302 and after that this this m 0.0 will
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be used here as normally closed contact
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so the address for this normally closed
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0.0 for now we have completed the ladder
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diagram so when lowlevel sensor detects
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the level is low the pump will turn on
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seconds and then if high level sensor
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detects the level is high then this m
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0.0 gets through and when it it gets
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through this pump will turn
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off and then when again low level uh is
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sens then the Palm will turn on again so
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in this way it will go on and on so I
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will start simulation here
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finish after that I will start
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CPU okay and then start mon
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and after that uh switch up the project
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view let's create a new project here
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after that you go to simulation tables
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one so here I will right click here and
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tags so now we can start the simulation
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so when a lowlevel sensor detects the
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as you can see here when lowlevel sensor
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gets activated waited the pump gets on
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seconds and it will remain on for 30
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seconds lowlevel sensor detect the level
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is low the tank is uh the level of the
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tank is low then the pump gets on and it
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will remain on for 30 seconds and after
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that it will turn off if the uh level of
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the sensor is not low uh even though
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this pump will turn will remain on for
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seconds and after that it will turn off
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so when the lowlevel sensor again gets
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case the level of the tank gets high so
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when this high level sensor gets
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activated when this high level sensor
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activated this pump will turn off as
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this m.0 gets through and this m 0.0
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breaks the circuit and this pump will
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so after uh 30 seconds and after 30
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seconds the high level sensor gets
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deactivated because the water is being
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used and after that if again lowlevel
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detected the pump will not turn on after
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uh 30 seconds it will turn on it was all
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about this example thank you for
