Introduction to PLCs and Ladder Logic concepts.

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Sorry for the inconvenience, but I am trying to get my videos organized and separate the videos related to school topics from the airplane / fun / nonsense videos.

[@ericdavila2055]

finally someone that can explain in details.

[@jamesselman6021]

Thanks for taking the time to explain the details! You are a great instructor!!!

[@andyg4929]

I'm currently in my 5th year of apprenticeship with the IBEW and we are studying PLC's in depth this year. This video was immensely helpful, thank you!

[@LightAndSportyGuy]

Thank you for the comment, glad it was a help!

[@MinatoNamikaze607]

im apprenticing as a millwright but am finding this stuff very interesting and the way you explain it is very 'simple to follow along' great stuff! thank you for the knowledge you are sharing.

[@LightAndSportyGuy]

Thank you!

[@reginaldalstonii9741]

Awesome intro! Thanks for the quick lecture!

[@LightAndSportyGuy]

+Reginald Alston II You are welcome. Thank you for the comment.

[@jimmybarra4814]

Sir, thank you for uploading that PLC Lecture,

[@LightAndSportyGuy]

Thank you for the kind comment.

[@nathanrussell2158]

Smart light and sporty guy.

[@ogungbebabatunde1289]

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.

[@loguway]

great, well explained. thank you very much.

[@LightAndSportyGuy]

Glad it worked for you. Thank's for the comment.

[@milawadmore7562]

Great Chanel, thank you so much for your time and effort !

[@ilhamshakhverdiyev2789]

Thanks Sir, really so helpful and understandable explanation.

[@LightAndSportyGuy]

Thank you for the comment

[@LK-pc4sq]

Love your enthusiasm :) some instructors are boring. Also, I am a former helicopter mechanic so love aviation.

[@LightAndSportyGuy]

Thank you!

[@syedhaniraza]

I have a question. WHY WE DIDNT PUT SIMPLE SWITCH BETWEEN THEM IN ORDER TO JUST OPEN AND CLOSE THE CIRCUT ? rather than putting relays and different switches and charging and discharging the relays. I didnt get that please someone could explain _

[@LightAndSportyGuy]

Industrial equipment often runs on 440 volts or higher and at many amps. Running wires for these gets expensive if you need to cover some distance and represents some level of hazard. It is more desirable to use low voltage, low current circuits for the control - particularly if there is come logic involved such as using limit switches or other sensors in a process. The relays let you separate the high voltage, high power circuits from the potentially complex control circuits.

[@stevenhackenburg3496]

to add to GeoffryThorpe123's response, (practically) all your modern computers and controls equipment run off of 24VDC, so they PHYSICALLY CANNOT send a signal strong enough to activate higher voltage circuits. For example, most motors you find in a factory run using 440/480 VAC (not DC), and require a current of several amps to turn on the motor ( called inrush current or Full Load Amps) because the electricity needs to physically turn the motor shaft. So instead of having a very expensive transformer ( to jump up voltage), Inverter (convert from DC to AC) and AMP (boost the signal strength) to get the signal of the controller compatible with the motor, you use an interposing relay. The relay takes a small 24VDC signal and physically closes a contact on the 480VAC circuit of the motor thus bypassing a ton of extra electrical equipment and adding the ability to physically separate 24VDC circuits ( safe to touch) and 120/480V circuits (hazard/deadly). and as Geoffrey said, not all equipment runs on a higher voltage circuit such as prox. switches ect, so adding high voltage equipment to the controller makes little sense. also, changes/updates to equipment and controllers are pretty common, so the more you separate differing voltage circuits the better. Example: if you had the transformer/inverter/amp ect. so you could just use switches and not relays like in your question, and then wanted to change the size of the motor. Now you have to change out all that expensive equipment to handle the new motor along with the motor itself. TIME + MONEY if you used relays all you have to change is the motor because everything from the controller to the relay would be the exact same. Plus changing motor stuff is fairly easy since industry uses MCC's ( Motor Control Center) which house all the high voltage motor stuff separate from the low voltage controls stuff.

[@ROBERTBPIZMAT2C4U]

Hsi S Relays can manage more current and isolate that circuit at the same time. ie. With a miniature switch you energize a relay that turns on/off a high(power=watts) lamp/bulb, or a powerful electric motor, using a relay. Relays are met to carry high amperage (current) without damage(burning) the switch.

[@mariusradu55]

I am not an expert but I will try to explain: you want separation between the running voltage of the motor and the low voltage of the controls. it's not safe to run 400V wires to where your controls might be. Also to start the motor you need a specialized contactor to deal with the arcing and inrush currents and so on.

[@pir869]

if the switch holding the relay armature (which close the relay contact) is opened the system will either start or stop depending on which control switch is used. The switches handle low current and can be quite cheap,the relay contacts can handle high current ,high current switches are expensive and can burn out quite quick,whereas relays can be sealed and gas filled to avoid contact arcing and last much longer. Plus if the switches are just on and off,there is a risk of accidentally starting the device,because a toggle on/off switch can be knocked to the on position,whereas the feedback on/off system gives a bit more safety. So in short safety ,power handling and cost.

[@michaelcostello6991]

Good video. Thank you. Lectures like this help me to pass my exams.

[@LightAndSportyGuy]

Glad to help. Thank you for the comment.

[@marabunya]

I loved this. Thank you.

[@LightAndSportyGuy]

Thank you.

[@تكلمبالعربية_وهران]

Many thanks you are a great instructor.

[@LightAndSportyGuy]

+abdo boulanouar Thank you - glad you found it interesting.

[@hosseinkarimzadeh3085]

Thanks for your explanation I enjoy

[@LightAndSportyGuy]

Glad you liked it!

[@mefireabdouladif9480]

Hey that's great sir. Thanks for sharing

[@Experts_top_5]

thanks sir,well explained.

[@LightAndSportyGuy]

Thank you.

[@bipinpatel2501]

send me a heating program using plc ladder diagram (temrature transmeatre pt100 - 100 - 150 kilo ohms temrature transmeater (4-20 ma )

[@张涛-l9i]

thanks very much for your video, it is really helpful

[@LightAndSportyGuy]

Thank you for the comment.

[@elcompavergolia9986]

The green marker was giving me anxiety 😫 Throw it in the trash please!!!!!!

[@LightAndSportyGuy]

Yea, pretty thin... Sorry. On the bright side, it's long gone.

[@kikibarrios]

Very nice job, thanks

[@jasonmeyer5320]

I kept laughing about the way it was done in the 50's because that's the way i still do it

[@LightAndSportyGuy]

+Jason Meyer Do I offer sympathy or congratulations? :-) Thanks for the comment.

[@uzhavarasan4505]

Dear sir, can we use the plc program in java or c language.

[@LightAndSportyGuy]

Some PLCs can be programmed in C (e.g. Siemens), many can not.

[@uzhavarasan4505]

@@LightAndSportyGuy thank you sir for the reply.

[@bikramjeet3208]

very well explained ..thank you so much

[@LightAndSportyGuy]

You are welcome.

[@controlandautomationtips3290]

Very well done.

[@LightAndSportyGuy]

Thank you.

[@relaxedlife5798]

gr8 practical explanation...

[@LightAndSportyGuy]

Thank you.

[@hasibturzo9704]

Awesome.Really helpful.

[@LightAndSportyGuy]

Thanks for the comment!

[@ranaabdulrehman7583]

you great man i like you and your work

[@LightAndSportyGuy]

Thank you very much.

[@syedhaniraza]

Where is the next lecture after this ?

[@LightAndSportyGuy]

I had issues with the video quality and I need to re-record it when I get a chance.

[@syedhaniraza]

+GeoffreyThorpe123 just upload them. u r good, i was looking how u start programming that device which u showed at start and which PLC software u use but .....plz upload fast.

[@LightAndSportyGuy]

Sorry that it wasn't fast, I have been out of the office. But it is now here: kzbin.info/www/bejne/fZzYf5p3gJemf5o (I am moving the school related videos to a different channel and trying to clean things up a bit)

[@techsolver9347]

Thanks Sir 👍🏻

[@travelingwithchun]

Thank Sir a lot :D, so informative

[@LightAndSportyGuy]

Thank you for the comment.

[@stephenadams1714]

very helpful

[@ugyennamgay2844]

Great

[@engrmynul]

Thanks Sir

[@LightAndSportyGuy]

You are welcome.

[@killouazoldyck387]

Find step7 high level exercises-solutions on notesale

[@saifurrahman7675]

Tx

[@LightAndSportyGuy]

You are welcome!

[@camroythorpe7211]

Cool

[@LightAndSportyGuy]

Thank you.

[@ricardogondim2346]

I think you like to show off, but its not really very explanatory. Its just draws on a board, and a lot of talk. And let me say that, i know ladder programming, and watching this is like , to much talk and sayinh nothing. But it seems that you are having a great programming life, so keep it up, and best of luck to you, honestly.

[@LightAndSportyGuy]

Well, if you already know ladder programming then this video would have been 20 minutes of your life you will never get back - but my students typically have never seen any this and typically ask why can't we just program in C (which they know)... So I have to explain all this to them.

[@ricardogondim2346]

Sir, i would like you to understant that i am not against you and i really wish you the best. I did not watch the entire video, maybe that´s why ... And even if i had seen it all, it was not a waste of time, because i love to learn, and i don´t know everything so, it is always nice to watch other videos. I will watch now the entire video and give you my opinion later. I respect your way of teaching, and i hope you´ll get the recognition you deserve.

[@HandeLoco]

nadai guna agik ku

[@trevortracy611]

Tracy Electric is competitively hiring Automation and Controls professionals! Apply today: www.ziprecruiter.com/job/c4135a69 www.Tracyelectricinc.com

[@LIGHT_IDEAS90]

That's a great one I really want a full lesson of plc ladder program. From basics. Can you help me?

[@LightAndSportyGuy]

I find that Tim Wilborne kzbin.info/door/_YccYdH0DBFp2ah0QuJ1lQ does a pretty good job.

[@lokig8640]

I've watched alot of videos trying to understand ladder logic and you made it so simple

[@LightAndSportyGuy]

Thanks for the kind comment!

[@joeyturner9687]

wow!! this is cool I know this is a older video but just coming across it, I've enjoyed. your other video's but this one is right up my ally. I've been in the Automation and Control industry since the late 80's mostly dealing with the Oil & Gas industry. And have built a few tests panels/trainers and still have them all. it's not often to find someone that has a passion for aviation and know about Automation and Control systems i.e. PLC's I've dealt with a lot of different types of PLC's but mostly Allen Bradley PLC's and interfaces (HMI) i've used the first Bata version of WW and the first Bata version of RSView when they first came out. it's nice to have seen the evaluation with the PLC's and the HMI's over the years. i also really like your merlin, and looking forward to the new changes to the MOSAIC rules not sure how much or even if it will bring down the cost but may make it easier access.

[@D.Hozzie]

Am I hearing some …..disdain when you say “ electrician “? 🤓🤓

[@LightAndSportyGuy]

Nope.

[@nglistrik]

Thanks Sir

[@agungpambudi8740]

matur suwun, from indonesia, java

[@LightAndSportyGuy]

You are welcome.

[@betuellinodossantos1789]

QUANDO FOR ENSINA OS BRSILEIRO FALI EM PORTUGUES

[@ricardogondim2346]

Mais vale voçe procurar outros videos que ensinem a programar ladder. Este não é o melhor, é muita conversa e pouca ação.

[@rivendall]

a very good tutorial. thanks

[@LightAndSportyGuy]

+rivendall Thank you for the comment. I'm glad this worked for you.

[@saifurrahman7675]

Wow

[@gotjiza8821]

Thanks for your videos

[@LightAndSportyGuy]

You are welcome. I'm glad you found them useful.