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Posted

FBD is one of the 5 IEC 61131-3 programming languages.  There should be hundreds of books and tutorials on the Internet on this standard programming language.  I know for a fact that www.plcacademy.com and www.realpars.com have information.  And there's a few hundred YouTube videos.

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Posted

What Crossbow said, I would only add that Mitsu have really good documentation, so e-manual viewer should be your friend once you have the basics from online sources.

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Posted

Thanks to everyone if any of you send me the link of any course related to mitsubishi gxworks2 to learn fbd basic programming or its manual where with some examples to understand or any quickgude because my question can we do ladder logic and make over own block and then we call it in main function if yes for that we also do ladder logic then how fbd is more easier than ladder logic

Posted

The free Rockwell CCW might be useful to you as a practice environment. The Micro 800 line has FBD capability and you can run your program in an included emulator with some limitations.

Posted

FBD is just another way it is easy once you get used to it. for example a ladder function like ADD    i.e. [+ D0 K123 D2] adds 123 to D0 & stores it in D2, in FBD it's the same but they dropped the "K" so it becomes [+ D0 123 D2], however unlike ladder where the ADD function is effectively an output  FBD means you can tie one function result (output) to the input of another Also FBD allows you to use symbols directly so rather than have a single function per line of code you string them together. With GXW2 & the IEC languages the use of symbol only (local & global) means the compiler automatically assigns actual addresses when compiled however, if you are adding a HMI the only way currently to display data you need to know the physical address like D200, so global labels need to have the physical address allocated. Other things to consider is that you either need to maintain the original file on disk or download the symbolic information to the plc as without it the program cannot be uploaded from the plc in FBD it will revert to ladder with no comments. & not make that much sense.

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Posted
On 2/1/2025 at 9:56 PM, Parky said:

FBD is just another way it is easy once you get used to it. for example a ladder function like ADD    i.e. [+ D0 K123 D2] adds 123 to D0 & stores it in D2, in FBD it's the same but they dropped the "K" so it becomes [+ D0 123 D2], however unlike ladder where the ADD function is effectively an output  FBD means you can tie one function result (output) to the input of another Also FBD allows you to use symbols directly so rather than have a single function per line of code you string them together. With GXW2 & the IEC languages the use of symbol only (local & global) means the compiler automatically assigns actual addresses when compiled however, if you are adding a HMI the only way currently to display data you need to know the physical address like D200, so global labels need to have the physical address allocated. Other things to consider is that you either need to maintain the original file on disk or download the symbolic information to the plc as without it the program cannot be uploaded from the plc in FBD it will revert to ladder with no comments. & not make that much sense

 

Not all true.  There are many HMI products that can use the PLC's global labels directly, they do not need to be assigned addresses.  And GX Works2 is obsolete, GX Works3 does a much better job with the IEC compliant programming languages.  And many controllers now support uploading of IEC style projects.

Posted

Yeah sorry, I got mixed up with another post on another site where GXW2 was mentioned. But it is still the case that the symbolic file needs to be copied to the PLC to be able to upload although many do not do this

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