PLC programming using TwinCAT 3 - TwinCAT functions (Part 12/18)

When installing the TwinCAT development environment and runtime you get access the core functionality, but sometimes you might want to extend this with additional functionality as for example adding an SQL database connection. In this chapter we will investigate some TwinCAT functions that can be added.

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#TwinCAT3 #TwinCAT #PLC #Beckhoff

[hannahthoreson]

I always feel so bad for people who make these type of tutorials bc the first couple of videos will have 1000 likes and comments and then the last ones are just as much work to create but nobody gets that far. Thanks for providing such a great resource.

[Josempe]

Jacob, I agree with you, when we have fun, time passes quickly.
I am having fun and learning a lot from your videos.
Excellent work.
Thanks for everything, again 😁
Greetings from Venezuela

[soulrobotics]

Impressive.
I was developing a UDP protocol for a Siemens S7-12xx and was great. Then I have receive a request to do the same in Beckhoff. You have no idea the joy to see this chapter 12 from the beginning to the end!
You underestimate our “boring threshold”. I always look up the wireshark to peak into the protocol I am writing. Sniffing with that tool make a huge difference in developing time.
I saw that you pick Modbus TCP/IP. In my case I find out that the library that contains UDP is TF6311 let’s try.
Big Thanks for this series!

[sanoopgr]

I'm a fan of your state machines. Simple, clean and very much maintainable. Thanks for yet another great !!!

[tiagoemanuelmonteiro]

Been assisting every episode of this series. Incredible job Jakob, making young adults like me, joining in the PLC world with the best practices in mind. I hope you the best of successes in life!

[TomScryleus]

Another great video by the master of PLC!
Proud to be a member and support this channel.
When is the livestream for members?

[gordonjones]

Awesome tutorial series - very, very helpful - and nothing else available out there even comes close!

[donkrx]

31:50 Actually cbLength is an input parameter, the max size of the destination buffer. The output parameter cbRead is actually the correct one for determining how many bytes were read. The documentation looks correct to me (but I haven't used this).

[brandonfarmer]

I've noticed that most TwinCAT3 programmers are divided on FB execution. I am a fan of having the FB outside of the state machine to ensure that it is always called every single scan, no matter what, then manipulating variables (like a variable to set the FB trigger) inside the state machine. It seems that you are in the other camp of executing the FB inside the state machine? The benefit of single execution is that it only gets called in a single location, and there is no duplication of the input/output variables where programmer errors could occur if something is changed. Any thoughts on this topic? Thanks again for the content!

[alexanderandinger]

Great series! Where can i find the advanced series 13-18?

[Fine_i_set_the_handle]

11:00 I'm with you on that, no idea why they swapped what should logically be the identities of the master and slave.

There's so much unnecessary additional coding needed after you've already installed a package, modbus is an extremely old and well documented protocol all you should need to do is create the arrays and call or write to them as you would normal variables. All that extra stuff should have been handled in the background by the package.

[Landqvist]

Hello!
I was looking through the Beckhoff documenation and saw that you can map the signals directly to a GVL, which seems alot easier than doing it the way you did.

Why didnt you do it the way i described? What are the benefits with doing it the way you showed in the video?

[Runtimevic]

hello Jakob Sagatowski,
great modbus tutorial video...
a question for the TF6310 | TwinCAT 3 TCP/IP, exists to send the FB_SocketSend, should we also make a small state machine like the one you have made for modbus?
tahnks you, 😉 👍

[mosheashkenazi]

Hi Jakob thanks for the great stuff
I have a question
If i wanted to read the data from the server constantly and monitor the change in the plc
For example a temperature value
Should i call the read function every few milliseconds?

[nadeemnazar]

Hi Thanks for the Video. i am using CX9020 PLC and ICP CON ET-7026 Modbus Device. I am getting Error 6. in the documentation "target port not found". I have added 502 port also in the PLC firewall. still not working .

[pawemadej]

Hello Jakob, Is it possible to play with TwinCAT and modbus communication without having real PLC? I tried to connect cheap CH340 RS485-USB converter to TwinCAT but it. uses virtual COM port like COM5-6 and Serial Device in TwinCAT allows me to choose only from COM1-4.

Any hint on this really appreciated because I didn't fount any such use case anywhere.

[JosephSalmans]

I wish I could find a video for a modbus server in twincat

[Moerkness]

I got ads error 6 🙂 modbus server is on the other physical computer.