Expert Guide to TIA Portal Function Blocks: Pro Insider Tips and Best Practices
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- Опубліковано 28 сер 2024
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Function blocks are a great tool to create structure and re-usability in your TIA user program.
In today's video, I am giving you some great insides in how to properly integrate function blocks in your PLC application - go and check it out!
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A good teacher should be like this...
Thanks!
Primary reason for me to use FBs, I hate merkers. But that's more or less a 'how to structure this' issue. I want to use as less merkers as possible.
Regarding the local variables of the FB, I always use the following notations:
Input : i_"Tag_name"
Output: q_"Tag_name"
InOut: iq_"Tag_name"
Static: "Tag_name"
Temp: t_"Tag_name"
Constant: "TAG_NAME"
If your code is clear, everybody can see if it's a binary value, int, word, real, etc, but it's hard to see the difference between a IO, static or temp variable.That's why I use this system. But every structure is better than no structure.
Keep up the good work!
Regards,
Alex
Thanks for your explanation Alex, I almost use the exact same tag name convention as yourself 😃. As for merkers, you are correct, they should be avoided at all costs. Build structured data in Datablocks instead.
how do you use the function blocks? how did you get a pump section? where did FB- Control pump come from?
Hi David,
The meaning of this tutorial is not to explain the application that I am using, it is to point out some important insights and tips on function blocks in general.
Have done your programming & HMI course and i have to say , they are best ones out there. Not to many go into detail on you actually structure a program.
Will there be any more in the future?
Thanks Martin for your feedback, great to hear that you like the courses. Yes structuring has always been one of my focus points when developping software applications and a structured approach to programming has helped me a lot throughout my career.
At the moment I have no other courses planned, trying to setup my own online courses website at www.plcskilltree.com. Once I get that up and running and get marketing in place for those courses, I will definitely consider more courses. So stay tuned, subscribe to the channel here if you haven´t done it yet because new courses will definitely be announced here.
-Hans
Superb video tutorial. Keep up the good work.
Thanks Casey - appreciate the feedback
Hey bro 👊 thanks for this amazing video ❤❤
No problem 👍
Many thanks. Excellent video!
Thank you Andre.
Great lesson Hans! I have a question about using timers or other function like counters, for example, inside user created FBs. Is there any concerns about this practice? I mean, like performance/memory issues or so? Thank you!
No problem using timers, counters inside an FB. As a matter of fact, this is the only correct way to use them in TIA because you can call them using a multi-instance (which is not possible in FCs or FBs). Never use hardware timers or counters (e.g. T20, or C4), use IEC timers instead.
@@PLCskilltree thanks for the clarification!
problem of the FB's is that in fact you have double memmory usage. Each input and output are stored in instance memmory. You have UDT as "iq" parameter and you store same memmory in global variable as well in your instance..so you expend you memmory usage. So i exceed the work memmory limit by creating "big" projects ( 50 valve's , 20 motors, 40 Switches etc...) Solution: replaced all to the FC's and use the counter for count the time and its reduce my memmory usage at least to 40%... :) I still think that the best praxis to use the FB's only in OOP (example TwinCat/Beckhoff) there you can create the object(class) and work almost without "global variables" and you will avoid double usage of the memmory as well many benefits from OOP. Waiting Simatic AX
Using the InOut of an FB only passes the UDT through to the FB, like a gateway (=call-by-reference). Using the Input and Output of an FB required copying to and from the instance data of the FB = requires extra resources. I only use FCs for small repetitive tasks that don’t require static memory, like small calculations, conversions, or scaling operations. I use practically only FBs in my projects (and they get very big) and I never had problems with work memory (retained memory is a different conversation)
Very easy and useful.. Cintinue
Thanks Samy, appreciate the feedback.
Hello there, i wanna buy you tia course this hmi and plc is this still available and also if ever buy this course and i want to ask something about the plc and hmi how do i reach you so that i can ask you when im understand some topics thank you
Hi Nelson,
you can find the bundle (PLC and HMI course) right here:
www.plcskilltree.com/bundles/tia-portal-all-basics
This is the best value for money. You can buy each course separately as well.
When you take the course, you can ask questions directly inside the course (by using the "Discussions" area of each lecture). You will see, it´s quite easy to navigate the course and ask questions when you like.
My visa card not accepting your course
Im trying to pay now
Done Sir hans im already enrolled to your course
@@nelsonpantaleon7751 Great! What was the problem with the Visa payment?
the coupon code is not working for me. Do you have a new code? Thank you
The coupon code is TIAPORTAL25OFF and is the same in all video descriptions.