What is an Open PLC?

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Күн бұрын

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⌚Timestamps:
00:00 - Intro
01:19 - Differences between closed and open PLCs
02:48 - Advantages of open PLCs
04:34 - Summary
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In this video, we explore the concept of an "open PLC" and how it differs from a traditional, "closed PLC."
A Programmable Logic Controller (PLC) is a device used to control industrial processes and automation systems. To program a PLC, you need to write a program on a computer and then download it to the PLC. However, before you can begin writing the program, you first need to install programming software on your computer.
Let's take a look at three different PLCs: PLC A, PLC B, and PLC C. PLC A can only be programmed with software A. PLC B can only be programmed with software B. PLC C, on the other hand, can be programmed with software C, software D, and software E.
PLC A and PLC B are what we can call "closed PLCs" because they can only be programmed with one specific software. This limits the options and flexibility that you have when programming these PLCs. However, PLC C is what we call an "open PLC." An open PLC is not limited to one programming software and can also be programmed by other programming software. This provides more flexibility and options when programming the PLC.
One example of an open PLC is PLCnext from Phoenix Contact. The main programming software that can be used for programming this new PLC is PLCnext Engineer. But in addition to that, this PLC can also run programs created by other programming software such as Visual Studio or Eclipse. These software allows you to write code in C++, which can be used to write programs that may not be possible to write using traditional PLC programming languages such as ladder logic, function block diagram, and structured text.
In summary, an open PLC is a next-generation type of PLC that is not limited to only one programming software. It can incorporate higher-level languages programmed by other programming software as well. This provides more flexibility and options when programming a PLC. If you want to learn more about this new technology, consider taking a free course on PLCnext configuration and programming basics.
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If you want to learn more about this new technology, I suggest starting by taking the free course on PLCnext configuration and programming basics on RealPars if you haven’t already.
- PLCnext Starterkit Configuration and Programming Basics learn.realpars.com/courses/pl...
Once you complete this basic course, you’ll be ready to dive even further into the world of open PLC by taking the PLCnext ladder logic programming and then Using C++ project with PLCnext.
- PLCnext Ladder Logic Programming for Beginners learn.realpars.com/courses/PL...
- Using C++ Projects with PLCnext Technology learn.realpars.com/courses/c-...
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Пікірлер: 47

@rhysdavies8947 Жыл бұрын

Imagine a PLC programmed through the browser with in built program and UI through a browser, forget A,B,C,D,E. It’s truly open.

@przemysawkrupiarz1587 Жыл бұрын

I would love that, then I could drop the intel processor and go with ARM macbook

@przemysawkrupiarz1587 Жыл бұрын

@@SamuelVenturaMtz Oh yes, I would miss spending a whole day to install some bloated Siemens software

@nathanielblack6323 Жыл бұрын

Rockwell Micro 800 range does this.

@isakoqv Жыл бұрын

As a continuation of this topic, I would love a video on the subject of IEC 61499 and vendor-independent control systems.

@realpars Жыл бұрын

Thanks for your topic suggestion, Kamikasi! I will happily go ahead and pass this on to our course developers. Thanks again for sharing!

@mw3blackopsglitches Жыл бұрын

Good Video!! Will have to check the course out.

@realpars Жыл бұрын

Hope you enjoy it!

@tommyhuffman7499 Жыл бұрын

Any text editor, or even command prompt, can allow you to write code. It's the compiler/interpreter that changes it from text to code. You can also write code for PLC's using a generic text editor in certain cases, on a closed PLC. I love the idea of a PLC allowing you to program in C++.

@realpars Жыл бұрын

Thank you for sharing that, Tommy!

@gene_Code Жыл бұрын

Yeah but editing code in notepad is so 90.

@AlexandreSantos-gg9il Жыл бұрын

RealPars is excellent, from Brazil.

@realpars Жыл бұрын

Thanks a lot for your support, Alexandre!

@flyte9844 Жыл бұрын

I had a plc next on my computer desk at the office for the last 2 month , can't wait to have time to play with it ! D:

@realpars Жыл бұрын

Great! Happy learning, Flyte! :)

@NikolayLinkov Жыл бұрын

Good explanation. But what about program cycle in open PLC? Does it takes similar execution time as closed PLC? As I remember the main purpose of PLC based system other more flexible PC ones is very short cycle time that is critical in many industrial automation process. So my question in general is: will we lose cycle time by increasing flexibility?

@realpars Жыл бұрын

The answer is in the controller on which the program is executed. The "open" part of the description of "open systems" refers to the ability to programming the logic independently of the manufacturer of the controller it runs on. This gives the engineer flexibility to use the best tools available for development of the logic. However, the code is still compiled and downloaded to a CPU for execution. The speed of open controllers, such as PLCNext, are just as fast as comparable PLCs from Rockwell or Siemens.

@NikolayLinkov Жыл бұрын

@@realpars Thk u for detailed answer. Glad to know that program cycle is still depends on size of compilled programm. I am stronlgy agree that ability to use the same code on different PLC is a huge benefit of that technology!

@dawitworkneh1485 Жыл бұрын

Thank u guys

@realpars Жыл бұрын

You're very welcome, Dawit!

@PeopleAndroid Жыл бұрын

Great video! I know you mentioned you aren't sure about where the design dept draws those, but is there anything you can do to ask them. I want to learn to do those drawings in that style. Thanks in advance :)

@realpars Жыл бұрын

Thank you very much! I quickly asked that for you, and they mostly use simply Adobe :). Hope this helps!

@richardkraus6427 Жыл бұрын

The idea of a plc is simple logic that can be understood and edited by non programmers. By going to a high level language you gain an incredible amount of horsepower but defeat the reason these things were invented.

@hyderalinagori3559 Жыл бұрын

Helpful

@realpars Жыл бұрын

Glad to hear that. Happy learning!

@sainarendrasangani2652 Жыл бұрын

Hi Sir, I'm recently passed out mechanical engineering (bachelor's in mechanical engineering) student in At present situation which is the best job for mechanical student can u please suggest.Thank you.

@natriumguy8537 Жыл бұрын

I am wondering if we are to program PLC using Visual studio then how will we download written program in PLC? Would I require PLCNext engineer software for that?

@realpars Жыл бұрын

Yes, you would use the PLCNext Engineer software: www.plcnext-community.net/makersblog/how-to-use-visual-studio-code-to-write-c-for-plcnext/

@syufrijal Жыл бұрын

Very cool explanation of open PLC...can we used c++ language for plc programming?

@realpars Жыл бұрын

Yes, C++ can be used for programming. Per the Phoenix Contact website, "You can create programs in C++ and import those into PLCnext Engineer. There, you can instantiate the programs and use them in the same way as conventional IEC 61131-3 programs in real time".

@syufrijal Жыл бұрын

@@realpars thank you sir

@kedarpuranik750 Жыл бұрын

I they could also support python it would be a great advantage as C++ could be a bit of a challenge for beginners where as one can learn python quite easily.

@murillogumiero Жыл бұрын

PLCnext also supports Python

@warrenscorner Жыл бұрын

That’s an interesting concept but wasn’t PLC software designed in ladder logic so it would be simple to understand and easier for electricians to read? I recently had a project that involved programming a stepper motor controller in c++. What a nightmare! What do you consider the clunkiest of all the closed PLC software to use? We have some Mitsubishi PLC’s and their software sucks. Not a big fan of Rockwell’s Connected Components Workbench either.

@realpars Жыл бұрын

Thank you for your comment. I am an old-timer in automation (40+ years) and I know that the more advanced languages are going to create problems in troubleshooting for most technicians. For engineers, these advanced languages are familiar, but technicians do not have the skills, for the most part to troubleshoot these programs. I always ask the question, "Are you willing to support your C++ program on third shift, weekends, and holidays?" when I have an engineer say that ladder is old-school and we need to program in C++ or some other advanced language.

@nikolaydubina Жыл бұрын

nice

@realpars Жыл бұрын

Glad to hear that!

@luzeniltonjr.4049 Жыл бұрын

The PLC manufacturers could open the architecture and the ISA instructions so we can make our own compilers e maybe new languages

@anplechen Жыл бұрын

Hi folks! I don't really understand why we call PLC "open" when the PLC can be programmed only using its original software and C++. We cannot program it with help, for instance Python, or whatever... As for me, PLC "C" in the video example is also closed. But it's only my point of view.

@realpars Жыл бұрын

Thank you for your comment. "Open" is probably an over-used word that needs some context. If a PLC can be programmed with other than the programming software provided by the PLC vendor, then it is considered "open". Every CPU requires programs to be compiled into code of a certain structure and providing an "open" programming environment is easier to do with some hardware platforms than others. In my mind, the only true open platform would be one where I could use a text editor create a downloadable program to a CPU. We will get close to that ideal in time.

@TheAnalamanga Жыл бұрын

i thought the open plc can be programmed with any software such as tia portal, cx-one... it has just been added with another language but does not make it open at all... ??????

@realpars Жыл бұрын

The answer is in the controller on which the program is executed. The "open" part of the description of "open systems" refers to the ability to programming the logic independently of the manufacturer of the controller it runs on. This gives the engineer flexibility to use the best tools available for development of the logic. However, the code is still compiled and downloaded to a CPU for execution. That said, every CPU requires code to be structured at the machine level in a certain way. In open systems, the compiler, or other interfaces available for the specific CPU, allow multiple programs, but not all, to be used to create the PLC code.

@augustobuczek2816 Жыл бұрын

👏👏👏🇧🇷

@mehulpatel9579 Жыл бұрын

🙏🏻🇮🇳

@voytechj Жыл бұрын

Writing a C++ programs for PLC is a good thing, but you have to be careful with stack overflow, memory management and many other things. C++ is not an easy language, that's why higher level languages like LD,FDB,ST were invented long time ago. PLC are computers, and inside there is probably some ARM microcontroller. Other MCU board like Arduino, STM Nucleo, etc. have free development tools, and main language of choice is C and less C++, but those boards aren't the final product. There is no optoisolation, weak IO driving capabilities, no power supplier, no case (PCB exposed), no EMI certifications, etc. Those boards are for DIYers and electronic designers. PLC is a ready to use product that can be used straight out of the box, and mount into DIN rail. Writing C++ programs feature can bring new customers that are familiar with "normal" programming languages. With strong MCU you can flash microPython interpreter, and use Python. Maybe PLCnext designers should implement that interpreter?

@realpars Жыл бұрын

Like most industrial products, new products are driven by demand. The drawback of microPython is the limited I/O support, which is the main feature industrial control systems are built around Instead of a 32-channel GBIO with fixed I/O types per channel, we would need to see a 256-channel GBIO with configurable channels before a microPython controller would be viable for large-scale processes, IMHO. But the world is moving toward these products, so it may be sooner than later that they will be available!

@vinicius464able 7 күн бұрын

I am finishing a stm32 board for replacing siemen's logo in some of my lower end projects. The logo works, but it is horrible to program and full of limitations in such a way that i consider the microcontroler using freertos way better for everything