PLC Ladder Program: OR and NOT Logic with Real-World Examples | Automation and PLC Series Part 5

Welcome back to our Automation and PLC Series! 🎉
In Part 5, we continue our deep dive into PLC Ladder Programming, focusing on implementing OR and NOT Boolean logic using NO (Normally Open) and NC (Normally Closed) contacts. Building on the concepts from our previous video, we bring these logic gates to life through practical, real-world examples.
🔹 What You'll Learn:
• Understanding OR and NOT Logic in PLCs:
o Learn how to implement OR and NOT Boolean logic using ladder programming.
o Understand the role of NO and NC contacts in creating these logic functions.
• Real-World Application in the Food Processing Industry:
o Scenario 1: How to raise an alarm if any of the two food processing machines fail (OR logic).
o Scenario 2: How to stop the conveyor system when any machine stops, ensuring safety and efficiency.
• Step-by-Step Programming:
o Follow along as we develop the ladder logic diagrams for these scenarios.
o See how ladder programming simplifies complex automation tasks.
🔧 Key Concepts Covered:
• PLC Ladder Programming Basics
• Implementing OR Logic with NO Contacts
• Implementing NOT Logic with NC Contacts
• Developing Control Logic for Automation
• Practical Use of Logic Gates in Industrial Automation
👉 Why Watch This Video?
This video is perfect for beginners and intermediate learners aiming to enhance their understanding of PLC programming and industrial automation. By the end of this tutorial, you'll be able to apply OR and NOT logic in ladder programming to solve real-world automation challenges.
🔔 Stay Tuned:
In upcoming videos, we'll explore more complex logic implementations and delve deeper into the world of PLC programming.
👍 Don't Forget to Like, Share, and Subscribe!
Help us spread knowledge by sharing this video with fellow engineering enthusiasts!
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📢 Join the Conversation:
Have questions or topics you'd like us to cover? Drop a comment below! We're here to support your learning journey in engineering and automation.
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#PLCLadderProgramming #ORLogic #NOTLogic #PLC #ProgrammableLogicController #IndustrialAutomation #AutomationSeries #EngineeringEducation #NOandNCContacts #ControlLogic #PLCProgramming #EngineeringConcepts #2DAnimation #AutomationTutorial #ElectricalEngineering #ControlSystems #EngineeringForBeginners #FunEngineering #EducationalAnimation
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We have an exciting news for everyone! We have developed a course on PLC basics in collaboration with Internshala where you can get good discounts using the coupon code ISRP16947850. Go check it out here- trainings.inte...
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Link to the #1 video in the series: • Introduction to PLCs: ...
Introduction to PLC | Programmable logic controllers | Steps towards learning Automation - 01
Link to the #2 video in the series: • Understanding Relays: ...
How does a relay work? | Normally Open | Normally Closed | Steps towards learning Automation - 02
Link to the #3 video in the series: • Understanding Sinking ...
Concept of Sinking and Sourcing in PLC | Steps towards learning Automation - 03
Link to the #4 video in the series: • Introduction to PLC La...
PLC Ladder programming #1 | NO NC contacts | AND gate logic | Steps towards learning Automation - 04
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Link to the video on Derived gates:
• Advanced Logic Gates E...
Link to our video on Boolean algebra
• Mastering Boolean Alge...
Link to previous videos on Gates:
Basic gates • Logic Gates Made Easy ...
Derived gates • Advanced Logic Gates E...
Link to the video: • Double Beam spectropho...
on Double Beam Spectrometer
Link to the video: • Basics and principle o...
on Basics and principle of Fluorescence & Phosphorescence measurement in Analytical Instrumentation
Link to the video: • UV-Vis Spectroscopy | ...
on Basics of UV-Vis spectroscopy in Analytical Instrumentation
Link to the video: • Isolating Radiations |...
on Filters and Monochromators, Gratings used in Analytical Instrumentation
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[@srinidhij4588]

This is a lot more detailed explanation ,thank you

[@miss0368]

as a visual learner, I love your video as there are pretty animation helps me to understand

[@gvenagas]

Good evening! Forgive me if I am wrong but I have found some things that hinder my understanding of the terms NO/NC physical contacts and MAKE/BRAKE XIO/XIC internal PLC logical contacts. First, i tend to believe that a circuit is activated when there is some action (pressing a physical button or contact by the user or when the physical relay coil is energised and therefore magnetizes the contacts. Second, i tend to consider the user physical switches and the logical internal contacts of the PLC program as contacts of one state, because that way the brain thinks more simply, while they are two states by definition (double throw). So even in the case of non-activation by the user or PLC program there may be an active circuit/load. With the terms NO/NC I personally like to refer to the user physical buttons or contacts while with the terms XIC/XIO, MAKE/BREAK the logical contacts inside the PLC program that are activated by the user. To what extent am I correct in my words? Thanks!

[@Kai...999]

I won't lie I forgot most of this in PLC class

[@Ddddaah]

What are you doing in life

[@winterytb2039]

Fr man 😅

[@jimcheriyan1801]

Great explanation and animation keep it up. Loved your videos on plc

[@mnsjewel4508]

Great video. But im from no basic. What if the alarm not worked (or failed) but we need to stop the conveyer? We need alarm also but our target is to stop the conveyer first. Isn’t it?? Please ans

[@asdfkj123]

Yes, why dont we program Input 1 and 2 to directly effect the Conveyor motor instead of going through the alarm first, I assume this is just an example, but in real life would it be better to have both the alarm and the motor on the same Rung in the ladder logic? and would they be in parallel or series... Thank you, let me know what you think

[@MM-fg3ep]

at 3:23: Instead of taking output of the alarm as an input of next rung; can't we do a parallel connection on o/p side of both "ALARM & BELT TO STOP" at first rung? so we can reduce one rung. any suggestions will be appreciated.

[@PracticalNinjas]

We have an exciting news for everyone! We have developed a course on PLC basics in collaboration with Internshala where you can get good discounts using the coupon code ISRP16947850. Go check it out here- trainings.internshala.com/plc-programming-training Get amazing content and support on Academic Courses, GATE Courses, Professional Courses and Career with Ekeeda. Go to ekeeda.com/ platform and register with the referral code EAPHAR74. Use the coupon code Ninja10 on purchase for special discount!

[@pokecardmaniacs1466]

Will you be making more plv ladder programming tutorials?

[@HamzanMartinez]

Wouldn't it be better to stop the conveyor first then sound the alarm? (I1 OR I2) AND Stop_conveyor AND (alarm)

[@enggresgampang9524]

Thank you Is helpfull, simple and clearly

[@durgeshdongre4422]

love you bro keep making such videos

[@PhoenixMario]

Awesome Video!! I subscribed to your channel 👍

[@dongwang3569]

Very clear demonstration, thanks a lot

[@runbou3019]

អគុណបង

[@sithabisozwane3138]

Please help me with this ...a green light is on when any maches out of the 3 machines is operational, a buzzer is sounded and the green light is of if any of the 2 machines operate simultaneously, should an attempt be made to operate the third machine while the other 2 are still running the buzzer sound is switched off and the other 2 machines stop , the red light must now come ON untill the system is reset , which alow the running of a maximum of 2 machines at any time again.

[@RajniKumari-fb7nb]

Sir please make more videos

[@krishnavamshichikkaA]

way of explaining 🙏🙏🔥

[@gunaseelan5171]

How the NC contact becomes NO without any physical invertntion during alarm pls explain

[@ramseyfernando3420]

Great except more lessons for plc.

[@PracticalNinjas]

we will be uploading next videos soon :)

[@rigvedamohan]

Required more content

[@ngawanglekchung53]

wait so how the NO activate? like what triggers it to activate?

[@Time4yes]

On Rung 1, You use contacts as switches to pass the current , so you control them manually. Say, you press ON, that's how they will ACTIVATE since they are Normally open contacts. It also called latching, you don't have to press the switches for long, just touch and go. The second network, which controls the conveyor is always on when the power is ON, it only turns OFF when the alarm is. Remember, this is just a demonstration of how the ladder is constructed for certain functions.

[@hariprasad8531]

Thank you for briefing about plc programming

[@Storyulagam02]

Please help to solve this problem A bottling process for 12 bottles operates as follows: a. Bottles are counted until all 12 are in position for filling (Filling Machine). b. When in position in the carton, the 12 bottles are filled simultaneously for 6.3 seconds. C. After filling, there is a pause of 3.8 seconds for foam to subside. d. The 12 caps are then put on and counted as they are installed (Capping Machine) e. A solenoid (5) then pushes the completed carton of 12 onto a conveyor. f. Conveyor (C) starts running. g. When the completed carton reaches the limit switch (L), that indicates that the carton is out of the "fill" position; the system is then reset for a new group of 12 bottles.

[@sumanmondal5055]

good one

[@Coowallsky]

Calling the input instructions “NO Contacts” or “NC Contacts” is a poor approach to teaching Boolean logic in PLC/PAC platforms.

[@electricalmaintenanceteam7702]

Good job ❤️❤️❤️

[@adamthefallnone1817]

I might have questions....k..... nevermind... I have a question. How do I delete parts of my ladder? I have an image/ladder of a newer machine on my "older" machine (same type of machine just built in different years), it is trying to read a pressure switch that never existed, I need it to read a float switch in the lube pump, not a pressure switch. I am an operator that got asked to fix something I have very basic knowledge of.. who can help?

[@kirankumargadwal4678]

Please do the complete course of PLC SCADA DCS and HMI

[@Your_thing]

Love ❤you sir kya explanation h

[@juju4link]

Can you help draw plc circuit for when PET bottles, pass the sensor on air conveyor the alarm should sound when theres no bottle presence, when bottles are present, it should be quite. Then lastly when no production run, alarm should switch off automatically. This circuit it cant get any signal from any external equipment as modifications are not allowed, the circuitry should remain standard by company protocol.

[@firstepisoderecap3428]

Great video 😍

[@Srk7028]

confusing part., Is OPEN means circuit is open and no supply ?NC and NO what is mean by it ?

[@gopavaramraghunath5980]

hiii your videos are great ,can u upload more, they are interesting and helpful

[@deepaa1994]

when the machine stops how will the contacts ne energised?

[@kounnachannel7578]

very good explanation

[@jashkapoor529]

found a proper video

[@JasbirSingh-iw9oz]

THANK YOU SO MUCH.

[@wilhelmimmanuel2628]

Great videos... Any way of getting into contact with you for ladder logic enquiries?

[@PracticalNinjas]

You can contact us [at] practicalninjas[dot]com

[@realstaticone8383]

Very nice idea to understand ☺️

[@marcel337]

👍

[@plchero8370]

Nice guys

[@Limpmoose]

I wish he didn’t have an accent

[@syedhassanali9330]

Thank you very much sir, very informative video

[@shashikantkunjir6733]

Nice explation.

[@johnlubango4158]

Balaa🔥🔥🔥🔥 now am understanding

[@instrum_company]

use plc simulator, we have fantastic simulator

[@PracticalNinjas]

It would be great if you could share us the link

[@instrum_company]

@@PracticalNinjas you can visit instrum youtube. Simple.

[@rsmengg5970]

as already I1 OR I2 signal signal is not zero which means motors are not running and the alarm is raised to indiacate that then why should one need to stop the motor which is not running already....

[@sharivinraj5526]

ladder rung 2 alarm(NC) contact connect with the conveyor motor which means the conveyor motor will run until the alarm trigger. Once the alarm is triggered the conveyor will stop automatically. thank you

[@chemicalengg.experimentsbypnp]

Nice

[@asitnagdeote5246]

Sir pls explain me why did we take 2 inputs?

[@kashirajvkkalshetti3498]

Awesome video sir

[@abdmorioglu4868]

what is the program you use for simulation

[@jaisinjacob481]

BRO HOWTO ADD TIMER INTERLOCK IN PUSH BUTTONS

[@edwinnjeru6782]

Great explanation on PLC. I am learning something new

[@sauravmazumdar5369]

Excellent...

[@azharghulamhussein6930]

i 1 and i 2 should be in series not parallel. Because any of them will stop the motor on the second rung which is normally closed input will turn to an open one.

[@MiriamOyugi2022]

They should only be in series if he uses NC contactors but in this cases he uses NO and hence it's correct

[@shinyi6902]

Hi may I know is video Plc ladder progamming #3 uploaded?

[@PedroHernandez-iz8ef]

Great video and great refresher

[@crazycanada2417]

buddy make video on Time delay switches please :)

[@nadatika]

thank you so much!!

[@faisal8815]

can someone help mw on ow to turn a light on by single push button ladder logic?.

[@Time4yes]

Use a NOT gate! NC (normally closed) state.

[@atulsinghtandan9232]

Nice explanation bro

[@ameiliaw8191]

Thankyouuuu !!

[@EuropewondersF]

Great job ❤❤❤

[@prasadkulkarni5399]

How to implement not logic gate ?

[@parthkulkarni8232]

Thanks!

[@arkhan6319]

Thanks a lot for ur effort!

[@isaacpardue8323]

Those are jars

[@family9977]

Thank you

[@shuaibalghazali3405]

Thanks for the video

[@ikechukwuchristian9844]

Thanks

[@edwinbautista5027]

Thanks bro

[@praisethelord1026]

Please keep doing🙏🙏

[@adonesgella8239]

Very useful video👍👍

[@germanhoernigappelius4418]

Muchas gracias. Son muy buenos, los uso para mis clases de Automatización.

[@PracticalNinjas]

Gracias por sus comentarios positivos. Estamos contentos de poder ayudar

[@shinyi6902]

Hi may I know is video Plc ladder progamming #3 uploaded?

[@PracticalNinjas]

No, not yet

[@chineduegbuonu2634]

Thank you sir..

[@suneeshka8676]

Nice

[@saurabhshinde7227]

thank u

[@mijanurrashid5312]

Can u make a sfc for 3level elevator?

[@ronakgupta566]

awesome 👍👍👍👍👍

[@PeaceMah]

I like it!

[@umargul5644]

Great 👍

[@pungliyavithika843]

AWSOME

[@ManjuManju-oz8cy]

Nice tanks

[@HassanAli-pj5cn]

Great

[@hellypatel3635]

Can we get more videos for PLC?

[@PracticalNinjas]

Yes, they will be uploaded soon

[@balajihallale7632]

we expecting taging also

[@enticomedyaapdtr12]

When is next video Brother

[@PracticalNinjas]

It will be uploaded soon. Till then stay safe and take care.

[@Akshay-cl5mz]

can u make videos for plc timers programming

[@PracticalNinjas]

we will be publishing them soon..

[@SandeepVShaji]

👍👍👍👍

[@teslacarfan]

Thank you

[@Juanjo-do4qz]

Explicas muy pero muy bien

[@PracticalNinjas]

Gracias por el cumplido

[@faustopina6639]

Matemáticas booleanas

[@reubenmensah3224]

Perfect Explanation!!! Appreciated Pal Keep posting

[@avirajnaik9094]

You Cannot take output of alarm as a NC switch for conveyor belt. Memory bit to be used.