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

Steps towards learning Automation - 04
------------------------------------------------------------------
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.

Subscribe to the channel to stay updated on the new content

----------------------------------------------------
Introduction to PLC | Programmable logic controllers | Steps towards learning Automation - 01

How does a relay work? | Normally Open | Normally Closed | Steps towards learning Automation - 02

Concept of Sinking and Sourcing in PLC | Steps towards learning Automation - 03

PLC Ladder programming #1 | NO NC contacts | AND gate logic | Steps towards learning Automation - 04
-----------------------------------------------------

Link to the video on Derived gates:

Link to our video on Boolean algebra

Link to previous videos on Gates:

Mathematical operations in digital systems

Constructing gates

on Double Beam Spectrometer

on Basics and principle of Fluorescence & Phosphorescence measurement in Analytical Instrumentation

on Basics of UV-Vis spectroscopy in Analytical Instrumentation

on Filters and Monochromators, Gratings used in Analytical Instrumentation

on Detectors used in Analytical Instrumentation:

on Single Beam Photometer used in Analytical Instrumentation

-------------------------------------------------------------------------------------------
Check our playlist on Digital Electronics:

Check our playlist on Analytical Instrumentation:
-------------------------------------------------------------------------------------------

Follow us on:
----------------------------

#plctutorials #ladderlogic #practicalninjas

[narsimha]

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.

[jagdishnawal]

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

[cncindia]

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

[shakhzodkhamidkhonov]

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.

[Michael-jpjw]

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

[blairwilkie]

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.

[davidpalmer]

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.

[judasl]

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

[ogungbebabatunde]

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.

[CHUITECH]

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

[AndreVassallo]

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.

[Mohammed.photographe]

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

[yunus]

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

[mubiruthadeossebalu]

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

[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!

[subramaniyanoffshoreabudha]

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

[generaltechnologyknowledge]

Good explanation in this video thanks for sharing

[EPSTech]

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

[ronakgupta]

Well explained..hope we will get more..

[stephenking]

Super explained
Please explain in Telugu
How write the PLC program