Siemens PLC Training: How to Write PLC Ladder Program | PLC Program for Water Tank Level Control

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In the previous video (Part 1) of this Siemens PLC Training course, we configured our PLC hardware in TIA Portal V15.1.

In this video (Part 2), we are going to write a PLC program in Ladder Logic (LAD) for a simple "water pumping system".

In the next video (Part 3), you'll learn how to simulate our PLC program using the PLC simulator.

In Part 4, we will continue our PLC programming journey with another simple, yet practical PLC program.

Before we get into PLC programming we have to know what the logic behind the industrial process is. In the real situation, there are some documents for this purpose, such as Philosophy of operation, I/O lists, Piping and Instrumentation Diagrams (P&IDs), Internal wiring diagrams, and so on.

We will learn about the Control and Instrumentation documents, and drawings and how to design and draw them in software such as EPLAN or AutoCAD electrical in future videos.

In this Siemens PLC programming tutorial series, we will write some Ladder Logic PLC programs in the Siemens TIA Portal for some simple but real-world processes.

We start from the simplest PLC Programming examples and will grow to the advanced levels. You will definitely learn some useful tips and tricks in every single example that you can use in your automation projects.

You do not need any actual hardware to participate in this course. So having a laptop with a TIA Portal installed on that would be enough! In most of the examples, you can use Step 7 and WinCC as well.

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▶ NO vs NC: 5 Practical and Important Points about NO and NC contacts

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SECTIONS of this video:

0:00 a review of the previous video and introduction to this video
0:40 required documents to write a PLC program
1:12 what we should know prior to PLC programming - Process Function Description (PFD)
2:39 opening up the PLC programming environment (OB1)
3:15 adding the PLC tags to our software (Creating the tag table)
4:24 programming the PLC for the water pumping system process

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▶ Watch the next/previous parts of this free "Siemens PLC Training" course to become a confident PLC programmer (This course will be continued):

Part 1: Up & Running with PLC Ladder Programming

Part 2 (This Part): How to Write PLC Ladder Program?

Part 3: How to Simulate the PLC Program?

Part 4: Motor Start and Stop Ladder Logic PLC Program

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▶ If you've missed our most recent videos, watch them here:

DCS vs PLC: 5 Important Differences between PLC and DCS

NO vs NC: 5 Practical and Important Points about NO and NC contacts

How Pneumatic Control Valve Works?

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[ricardogarcia]

interesting the video. Simple and pleasant. For my part I would add two input variables. One coming from the thermal relay of the contactor, to turn off the system and turn on a pilot light and the other to select between automatic and manual. Congrats

[kobbydaddy]

Great explanation, one of the best lecture.your voice and explanation was just😍🙏🙏

[Learn-lpnf]

i subscribe with you, i really appreciate your channel, unfortunately i talk more french, i don't understand. in any case good luck and thank you

[rajkumar.s]

Very amazing person and open heart ❤️ god bless you my friend

[V-BLUESUNRISE]

You are really good lecturer and you must continue to this video series

[braincrackz]

Very good explanation and presentation

[baoshenyi]

Could you please let me know what software platform that you are using? I am a SCADA HMI developer with Aveva.

[saifalniamah]

Simple and easy to understand it. Thank you.

[mohamedelbouchichi]

YES THATS GREAT AND VERRY HELPFUL BUT I WISH MORE VIDEO LIKE THAT WHO ANALYSE FAMOUS MACHINERY SOFT WARE AND HARDWARE ALSO TROUBLSHOOTHIG.

[AnasAl-Dhafiri]

Very good and clear explanation. Thank you

[bitebonumbere]

Please when are you going to populate your YouTube channel with hundreds of videos?

[bharathidasan]

Why you are using pool low level switch is nc contact to the reset coil could you please explain that .

[noelfaithfulkari]

Thank you sir for the simplified knowledge. I want to ask if such videos could be done for Allen Bradley Rslogix 5000 or studio 5000 with emulator for same simulation?

[NomadUrpagi]

Can i ask why didn't you use OB35 for this project? Was it because the plc program didn't need a quick update cycle?

[angvanhuy]

What software do you use to simulate this system?

[mdrasulmydeen]

Hi sir... Ro plant hmi full error (#) this simple shows the display. what about problem pls help me sir

[kobbydaddy]

Do you do online class for a beginner?

[alisa]

hello
how you simulation water in the pipe
and can i download project?

[LC-qiff]

When the low level switch senses water won’t it turn off the motor?

[aymenouahdi]

thank you for vidéo, can you give me the web to download tia portal v15