CODESYS: R_Trig and F_Trig (Rising and falling edge detection) instructions in Structured Text (ST)

If you want to watch the videos in order, download the up-to-date version of the road map from the pinned comment of the corresponding video: • CODESYS: A road map fo...
-------------------------------------------------------------------------------------------------------------------------------------
** You can jump to different sections using the timestamps **
Welcome to another video of PLC programming with CODESYS!
In this episode, I will show you how to use the edge detection instructions in the structured text (ST) in CODESYS.
First I will explain the way in which these instructions operate, and then using an example, I will explain how these instructions could be used. I have also created a simple visualization for the example project.
After watching the video, you are asked to extend the project and introduce additional features.
I hope you enjoy watching the video. Please let me know if you have any suggestions or comments.
Timestamps:
00:39 - Theory
02:45 - Description of the example and problem statement
04:33 - Description of the visualization and problem solution
06:50 - Explanation of the ST code
09:56 - More details on visualization
11:37 - Explanation of the project in the run mode
13:33 - Description of the exercise
14:45 - Thanks for watching!

[@Markdias1]

To the Best Teacher Ever! Thank you for making a difference! You are appreciated!

[@TohidAlizadeh]

Thanks a lot for your nice words 👍

[@RT-fi7rb]

At 6:21 is it possible that you have a mistake? Because R_Triq.Q should give the impulse at the rising edge?

[@danielwang7745]

At 6:15 is it possible that you have a mistake? please check below, Because R_Triq.Q should give the impulse at the rising edge?

[@ypkapo2]

10/10 🚀🚀🚀🚀

[@TohidAlizadeh]

Thanks 🙏

[@borek422]

Thank you for your work. I have a question, is it possible to download the code you show in the video somewhere? It was better for me for learning...

[@parshwabhavsar2283]

Hello sir ,My background is mechanical engineer but for my master project I have to work on codesyea and it is completely new for me ,eventhough I am following your video but I have to work on Wago hardware on my project and I don't have idea about it so how wago hardware is correlated with codesyes and what should I learn regarding than except from your video?PLc programming is completely new for me so guid me please

[@TohidAlizadeh]

Hi, thanks for your comment. Apart from programming of the PLC, which could be done using CODESYS for your WAGO PLC, I assume, you would need to learn about the hardware configuration, input and output interfacing and addressing, networking, and HMI, among the others. In my channel, the main focus is on programming, though you should be able to find the missing information in other resources. I hope this helps.

[@181ofir]

Tohid ,i have aquestion The r or f trig instruction will be TRUE only for a full cycle ?

[@TohidAlizadeh]

Yes, that is true.

[@danielewskidaniel]

Is there a block that recognizes rising and falling edges or do I have to create two separate functions for one variable?

[@TohidAlizadeh]

I am not sure if there is such a function, but you can easily create one, by using R_Trig and F_Trig receiving the same signal and ORing their output. This way, you will detect both rising edge and falling edge of the signal.

[@parshwabhavsar2283]

How to create signal light

[@TohidAlizadeh]

What do you mean by signal light, flashing signal?

[@ArshadKhan-ox5ry]

Good

[@TohidAlizadeh]

Thanks