PLC Ladder programming #1 | Learn under 5 min | NO NC contacts | AND gate logic
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- เผยแพร่เมื่อ 17 ต.ค. 2019
- 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.internshala.com/plc...
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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Derived gates • What are derived logic...
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Multiplication and Division • How do Digital system ...
Constructing gates
Using NAND • NAND gate | Universal ...
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on Single Beam Photometer used in Analytical Instrumentation
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#plctutorials #ladderlogic #practicalninjas - วิทยาศาสตร์และเทคโนโลยี
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.
Agreed!! Great video but that part confused me. Thanks for pointing it out
In electrical switches and switchgear NO or NC means that state of switching element position before applying electrical or mechanical energy on it.
I also thought this was stupid. NO doesn't change to NC when pressed, it simply changes to C.
No not the same as motor control its values or true or false. Its opposite to what you would think
@@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.
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.
Short, sweet , precise, crystal clear explanation- keep it up thanks
@@dantedanny2766 Yeah sure why hack celebrities accounts when you can hack your gf lol stfu liar.
Holy saaamokes! This the best tutorial ever on basic PLC ladder programming, thanks for posting!
P
hello. Thank you for this. I am searching for this very understandable tutorial bro. I find it good . Thanks a lot!
You guys explain really well.
you are an absolute legend. Explained 3 months of school in 1 video
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.
Thank you so much. Your explanation is very very clear.
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.
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)
@@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)
@@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 !!!)
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!
Thank you given me basic knowledge
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.
Superb cant explain in words that how i impressed from your video ❤️❤️❤️
Very clear illustrations. Thank you
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.
Поздрави от България
This video was very helpful. I am moving from technician to plc for Hvac
Thanks and do subscribe for more information 😎
This is so interesting, you're a good trainer thanks
Excellent, you explained well in short.
th-cam.com/video/-OUFe3rquRg/w-d-xo.html
Very Smart Ninja Moves.
Good explanation in this video thanks for sharing
Mantap..pelan dan mudah dipahami
Liked and subbed 😂😂
your 5 minutes video was waaaay easy to understand then our teacher who’s paid 54$ per hr 🤷🏻
Can I please ask which book must I use to understand plc and its simulations better.
So clear explanation.awsome
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!
Hats off to your explanations
Well explained..hope we will get more..
awesome video! Thank you!
Excellent and intuitive, thanks
You're awesome, thanks buddy
Thanks this was really helpful
thanks, brother
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Good information
Amazinggggggg!
I finally get it😆
good, do you have in structured text ?
Keep going with this wonderful stuffs
Messung nexgen 4000 PLC programming cable pin configuration please.(rs232)
Simply superb😍😍
Keep uploading regarding plc
yes, sure.
Hello sir I’m looking for Electrical Substation Automation corse where I can find it ? Thank you in advance ❤
Explained good
Really good vid!!
Thanks for this wonderful video brother...🙏🏾
Good tutorials. Watching from Bangladesh
Your vlog making quality is good.
Brilliant video, thanks very much!
👍👍👍❤️❤️ super explanation
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
Short and sweet
Great effort thanks 👍
Dear sir,
We have a Allen bradely cpu programs corrupt again and again.
Can you Suggest me.
What should I do.
Very nicee. Thanks
ok Sir and thank you for this information
Its actually examine on or examine off that statement can be confusing
Should just say no or nc. It isn’t necessary to even call them XIO or XIC o
@@joew4202 no because it could be either way no or nc and be a true statement
@@davidwhite5045 im in school right now and we always just say normally open or normally closed operand. we rarely say XIO or XIC
very good teaching best teacher
Super explained
Please explain in Telugu
How write the PLC program
Very understanding tutorial👍😭
Excellent...
Give practical example such as pharmaceutical machinery control granulation machine, automatic capsule filling machine,packaging machine from start to end.
Thanks very very much for video !
Thanks and do subscribe for more information 😎
Can u please explain about dol and star delta starter ladder diagram
Very good explaining ladder logic
35.5K subscribers. Is that in ohms?
:)
can anyone help me to know about software on which this programme is performed..
when input is not energized, NC contacts' state and NO contacts' state will be unchanged
Very good Teaching Sir, I Want to Fanuc CNC Ladder How Write, Pls One Video.
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...
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
Super Explanation
អរគុណ
Thanks from Viet Nam
Đoàn Bá Huỳnh which part of Vietnam are you in?
Hi Great country
me too moron
Steve Nguyen where do you live?
@@truongtruong817 ho chi minh city moron and you?
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.
Great lecture
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.
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.
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 !!!)
Hi, I like your video. Thanks
You are did a Great job
Can U explain Ladder diagram For to 2 way railway Gate Control at a Time By Automatic Mode
which software you are using?/
Nice Video
connect an open switch to [discrete input]?
Please make more videos on plc programming
good one
excuse me could you explain to me how can I connect more than one digital sensor on the same outlet in ladder
Thank you brother
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.😊
Great 👍
谢谢
sangat bermanfaat
Very nice video & concept is right but I a new comer.
sir i need to solve one problem can u please help
can you please share the free software on which we can write the ladder logic program. I have searched a lot but could not found anything on that
PLC simulator on google play for mobile
how did you do it can you share with me , thank you
Outputs can only connected in parallel you say but it in series with inputs..?..3.30
Thank you very much! Good video 👍
Thanks
Can you made video about conveyor?
thank you
To turn the light on and off with a single push button
So how to make ladder logic
sir can you then pls upload a video on how to wire/assemble a gameshow button lock up system just like your video now.