PLC Ladder programming #1 | Learn under 5 min | NO NC contacts | AND gate logic

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Steps towards learning Automation - 04
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In this episode, we will understand what is PLC ladder programming
PLC is a logic controller which has inputs and outputs to control a particular process. The relation between these inputs and outputs is established via a control logic. This control logic can be written using different programming languages. One of the most common and easier to understand language is the ladder programming. Check the video to know why the language is called ladder programming.
This video further discusses what are NO (Normally Open) and NC (Normally Closed) contacts and how they can be used in control logic to achieve a specific task. These programming blocks are explained using animations and example. The logic for AND gate is developed using these contacts. The further videos in this series will also cover more examples on developing logics using NO and NC contacts.
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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...
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!
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Link to the #1 video in the series: • PLC - Introduction | P...
Introduction to PLC | Programmable logic controllers | Steps towards learning Automation - 01
Link to the #2 video in the series: • How does a relay work?...
How does a relay work? | Normally Open | Normally Closed | Steps towards learning Automation - 02
Link to the #3 video in the series: • Concept of Sinking and...
Concept of Sinking and Sourcing in PLC | Steps towards learning Automation - 03
Link to the #4 video in the series: • PLC Ladder programming...
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:
• What are derived logic...
Link to our video on Boolean algebra
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Basic gates • What are Basic logic g...
Derived gates • What are derived logic...
Mathematical operations in digital systems
Addition and Subtraction • How do Digital systems...
Multiplication and Division • How do Digital system ...
Constructing gates
Using NAND • NAND gate | Universal ...
Using NOR • NOR gate | Universal G...
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
Link to the video: • The detection of radia...
on Detectors used in Analytical Instrumentation:
Link to the video: • Single Beam Photometer...
on Single Beam Photometer used in Analytical Instrumentation
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26 сен 2024

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Комментарии : 243

@narsimha7256 3 года назад

One suggestion to avoid confusion ,NO and NC terms are supposed to be used to indicate initial or normal condition ,if actuated/pressed NO contact become closed and same should not be called NC , similarly NC contact opens not to be called NO.

@MrBluntNose 2 года назад

Agreed!! Great video but that part confused me. Thanks for pointing it out

@sivasubramanian9298 2 года назад

In electrical switches and switchgear NO or NC means that state of switching element position before applying electrical or mechanical energy on it.

@AlexofSmeg 2 года назад

I also thought this was stupid. NO doesn't change to NC when pressed, it simply changes to C.

@nephilimshammer9567 2 года назад

No not the same as motor control its values or true or false. Its opposite to what you would think

@markjustdiditc 2 года назад

@@nephilimshammer9567 this guy is right..... programmable logic controllers only think in true and false, and they are advanced and simple at the same time.... if you plug NC or NO contacts from a normal relay into a PLC, it doesn't recognize it as "normally open or normally closed" unless you tell it to, via the True and False logic.

@Michael-jp9jw 3 года назад

Holy saaamokes! This the best tutorial ever on basic PLC ladder programming, thanks for posting!

@tamilchelvianathan9872 2 года назад

@shakhzodkhamidkhonov8164 3 года назад

thank you soo much for making your content crystal clear. I think this is a place where we get rid of stress that we take from complicated university classes.

@cncindia8384 2 месяца назад

Good ,Im an Engineer doing these things from past 18 years internationally ,u made a good video for basic learning students, even our tutors in past never explained it with ease like u have done

@blairwilkie6374 3 года назад

Very nice video; HOWEVER, a rather IMPORTANT point of clarification needs to be made. A device (such as a pushbutton or PB) that is Normally Open (NO) DOES NOT become Normally Closed (NC) when it is pushed. The NORMAL state of a device is its SHELF (i.e. out of circuit) state. Hence, the contacts of an NCPB will indeed CLOSE when the button is pushed; however, its NORMAL state (i.e. when NOT pushed) has not changed.

@PracticalNinjas 3 года назад

We completely agree with the points you have presented. A physical device manufactured as a NO type can never become an NC device. A lot of viewers have been confused with this point even though we never intended it. To bring more clarity on this concept, we are preparing next video on the same topic and differentiating between actual physical input (push button) and logical input (ladder blocks)

@anancrypto2213 2 года назад

@@PracticalNinjas 1.can we use capacitive touch pad switch (with 5v /24 v dc relay )......in place of start/stop/selector switch ? in a 24 v dc PLC? 2. As we are using retentive timers......how we can design ladder logic for PLC.. so that process start ITSELF after power supply resumes ? (i.e ..not starting with the help of start switch)

@anandjoshi8554 2 года назад

@@PracticalNinjas क्या पीएलसी प्रोग्रामिंग में ऐसा पॉसिबल है कि बिजली सप्लाई वापस आने पर पीएलसी /प्रोसेस, आखिरी रुकी हुई स्टेज से अपने आप resume /स्टार्ट हो जाए , बिना कोई इनपुट (स्टार्ट स्विच) मैन्युअली ऑन किये ??? (जैसा औटोमैटिक वाशिंग मशीन में होता है !!!)

@davidpalmer963 3 года назад

Very well defined. Most Electricians (Not dissing Electrical guys) do not know digital logic. Let alone boolean algebra. But this is the basis upon which the PLC processor works. It is , a microprocessor ( maybe soon a FPGA) that is handling the inputs, outputs and control logic.

@CHUITECH 3 года назад

hello. Thank you for this. I am searching for this very understandable tutorial bro. I find it good . Thanks a lot!

@judas0l7 2 года назад

This video was very helpful. I am moving from technician to plc for Hvac

@PracticalNinjas 2 года назад

Thanks and do subscribe for more information 😎

@AndreVassallo 2 года назад

I am trying to learn how to diagnose ladder logic. I like your presentation and believe I may solve my puzzle with this knowledge. Thanks.

@ogungbebabatunde1289 4 года назад

QUESTION In a corridor there are four switches and three bulbs. when a man enters from one side of the corridor and presses switch 1,bulb 1 gets on when the man presses switch 2,bulb 2 gets on and bulb 1 gets off. When the man presses switch 3,bulb 3 gets on and bulb 2 gets off. When the man presses switch 4,bulb 3 gets off. The same thing can happen if at any instance a man enters from any side the 3 bulbs. Write a PLC ladder logic.

@yunus6009 Год назад

you are an absolute legend. Explained 3 months of school in 1 video

@Mohammed.photographe 2 года назад

Liked and subbed 😂😂 your 5 minutes video was waaaay easy to understand then our teacher who’s paid 54$ per hr 🤷🏻

@generaltechnologyknowledge5165 4 года назад

Good explanation in this video thanks for sharing

@PracticalNinjas 2 года назад

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!

@mubiruthadeossebalu3508 9 месяцев назад

This is so interesting, you're a good trainer thanks

@gvenagas 5 месяцев назад

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!

@subramaniyanoffshoreabudha1478 3 года назад

Thank you so much. Your explanation is very very clear.

@serajknowledge 4 года назад

Thank you given me basic knowledge

@ronakgupta566 3 года назад

Well explained..hope we will get more..

@kohilanatarajan4339 3 года назад

Hats off to your explanations

@EPSTech 3 года назад

Superb cant explain in words that how i impressed from your video ❤️❤️❤️

@adistinirwana5037 2 года назад

Very understanding tutorial👍😭

@jagdishnawal4080 4 года назад

Short, sweet , precise, crystal clear explanation- keep it up thanks

@Mohammed-bd7ql 3 года назад

@@dantedanny2766 Yeah sure why hack celebrities accounts when you can hack your gf lol stfu liar.

@mustafamohsin6439 2 года назад

Good tutorials. Watching from Bangladesh

@LZ1SSA Год назад

Поздрави от България

@mayankparashar8613 4 года назад

👍👍👍❤️❤️ super explanation

@draganmihai4897 2 года назад

Thanks very very much for video !

@PracticalNinjas 2 года назад

Thanks and do subscribe for more information 😎

@ismailchirammal7936 7 месяцев назад

very good teaching best teacher

@sarishk5261 3 года назад

So clear explanation.awsome

@totolaw2654 4 года назад

Very Smart Ninja Moves.

@highwaysouth9015 13 дней назад

Thank you for explaining this❤😊

@PracticalNinjas 14 часов назад

You're welcome 😊

@danushkaariyarathna2053 4 года назад

Thanks this was really helpful

@EasyPLC21 3 года назад

Your vlog making quality is good.

@alwaga7917 3 года назад

ok Sir and thank you for this information

@praisethelord1026 3 года назад

Simply superb😍😍

@PiyushJaybhayeMusic 3 года назад

Brilliant video, thanks very much!

@mrdecent-mc7qx 2 года назад

Can U explain Ladder diagram For to 2 way railway Gate Control at a Time By Automatic Mode

@JohnSmith-kc7fi Год назад

Hi, I really like your videos.Can you these Ladder diagrams in Bosch Rexroth Software too?It would be a big favor for me Thank You

@sauravmazumdar5369 4 года назад

Excellent...

@purushottum9792 4 года назад

Excellent, you explained well in short.

@plctechworld 2 года назад

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@rhodakudor8554 3 года назад

Amazinggggggg! I finally get it😆

@1beejay1 4 года назад

Very good explaining ladder logic

@stephenking9041 4 года назад

Super explained Please explain in Telugu How write the PLC program

@P.Madhuri7032 3 года назад

Can u please explain about dol and star delta starter ladder diagram

@johnx9318 4 года назад

35.5K subscribers. Is that in ohms? :)

@sai060880 4 года назад

Very good Teaching Sir, I Want to Fanuc CNC Ladder How Write, Pls One Video.

@Oscar-jg9gg 4 года назад

when input is not energized, NC contacts' state and NO contacts' state will be unchanged

@anandmaster5242 4 года назад

Give practical example such as pharmaceutical machinery control granulation machine, automatic capsule filling machine,packaging machine from start to end.

@Simiey 2 года назад

Please make more videos on plc programming

@godwinessenyene8788 Год назад

Excellent and intuitive, thanks

@Deepak_Kumar1993_ 4 года назад

Keep uploading regarding plc

@PracticalNinjas 4 года назад

yes, sure.

@astleaugustin7748 3 года назад

Keep going with this wonderful stuffs

@ashikazarudeen508 4 года назад

Short and sweet

@marcel337 2 года назад

Great effort thanks 👍

@runbou3019 3 года назад

អរគុណ

@nemalikantisaikumar8899 4 года назад

Brother don't mind but if see a switch with NO and NC never a NO becomes NC if the switch is open then it is in NO, if the switch is closed then it is in NC but never a NO becomes NC only metal contact which is inside the switch changes I hope you understand but don't take it in a negative way...

@PracticalNinjas 4 года назад

We totally agree with what you said. The physical NO switch can never become NC and vice versa, it's only their internal contacts that change

@cncindia8384 2 месяца назад

Why not bro ,what exactly means NO means wo triggering with trigger force it becomes Nc it's basic

@sohailjanjua123 2 года назад

Hi, I like your video. Thanks

@JFK065 Год назад

You are did a Great job

@maninderpreetsingh878 3 года назад

Hello, The above are the just basics of electronics, Please tell me how to start the program. What basic inputs are required to start the ladder logic? Normally everyone starts with NO/NC contact. No one tells us first of all control philosophy required before starting the ladder logic.

@PracticalNinjas 2 года назад

Hi, we felt it's always better to start with basics. We will be following these videos with more advanced topics and programs as well. Stay tuned for more videos. If you are interested you can check the pinned comment on this video. It has a link for the PLC course that we have created.

@anandjoshi8554 2 года назад

is there any possiblity > the plc process resumes ''''automatically'''', without any manually switching input on , after power supply resumes ?? क्या पीएलसी प्रोग्रामिंग में ऐसा पॉसिबल है कि बिजली सप्लाई वापस आने पर पीएलसी /प्रोसेस, आखिरी रुकी हुई स्टेज से अपने आप resume /स्टार्ट हो जाए , बिना कोई इनपुट (स्टार्ट स्विच) मैन्युअली ऑन किये ??? (जैसा औटोमैटिक वाशिंग मशीन में होता है !!!)

@epstopikid8896 4 года назад

Mantap..pelan dan mudah dipahami

@ToolsAandLogic Год назад

At time 2.42 you are speaking that NO contact becomes NC when switch is pressed. This is wrong. Technically NO will be energized Closed when switch is pressed. and NC will be energised open when switch is actuated.

@davidwhite5045 4 года назад

Its actually examine on or examine off that statement can be confusing

@joew4202 4 года назад

Should just say no or nc. It isn’t necessary to even call them XIO or XIC o

@davidwhite5045 4 года назад

@@joew4202 no because it could be either way no or nc and be a true statement

@joew4202 4 года назад

@@davidwhite5045 im in school right now and we always just say normally open or normally closed operand. we rarely say XIO or XIC

@TheRallyCoop 10 месяцев назад

I was taught never to think of these as NC or NO,rather think of them as go look for a 1 or go look for a 0…I never understood why, and the person giving the advice never mention the reason. Can someone please answer this question for me? Thanks in advance.😊

@gopalchandrabauri5489 3 года назад

Very nice video & concept is right but I a new comer.

@pugalstech 4 года назад

Explained good

@nitingore6802 4 года назад

good one

@marciohogenelst 4 года назад

good, do you have in structured text ?

@Mohammed-bd7ql 3 года назад

You're awesome, thanks buddy

@oanbahuynh5892 4 года назад

Thanks from Viet Nam

@truongtruong817 4 года назад

Đoàn Bá Huỳnh which part of Vietnam are you in?

@alibalalak7145 4 года назад

Hi Great country

@Steve-bg4gs 4 года назад

me too moron

@truongtruong817 4 года назад

Steve Nguyen where do you live?

@Steve-bg4gs 4 года назад

@@truongtruong817 ho chi minh city moron and you?

@CindyKaufinger 4 месяца назад

Great pictures. But in PLC there is no NO and NC. There is "Examine" if Open and "Examine" if Closed. And the pictures are the opposite.

@yakikadafi6189 7 месяцев назад

Hello sir I’m looking for Electrical Substation Automation corse where I can find it ? Thank you in advance ❤

@dayamani5618 9 месяцев назад

Great lecture

@phutsisimmalefu8142 Год назад

Can I please ask which book must I use to understand plc and its simulations better.

@skcommunity9791 3 года назад

Super Explanation

@sushil4958 Год назад

Dear sir, We have a Allen bradely cpu programs corrupt again and again. Can you Suggest me. What should I do.

@richardkapolyo9127 4 года назад

Good information

@psg4417 3 года назад

Outputs can only connected in parallel you say but it in series with inputs..?..3.30

@AJAYKUMAR-mp8lq 3 года назад

Develop a ladder diagram for the following as: A solenoid valve with two solenoids Y1 & Y2 is used to control motion of a pneumatic actuator. Where Y1 is ON the actuator extends and when Y2 is ON it retracts. When a START switch is pressed the actuator starts extending. At the end of stroke, it operates a limit switch. After reaching the extreme position, it starts retracting. The cycle is completed when it is completely retracted. Both the solenoids should be OFF at the end of cycle. An emergency STOP switch is provided, pressing which the actuator should retract, from wherever it is and stop. Sir Can you please solve this? I'll be really thankful to you.

@plctechworld 2 года назад

Ok, it is very basic programming.

@plctechworld 2 года назад

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