Post by fredsta on Unable to load dynamic modules (Download failed: Application=Application) ^{CODESYS Forge talk (Post)}
Hey there, I am currently trying to find a good solution for the communication between CODESYS Control on Raspberry Pi and "the rest of the world", i. e. the things apart from CODESYS on my linux. My first approach was to use the c-integration. So I created a lib, defined extern fbs, compiled the code on my Pi using the SDK and put the .so into my lib project. When I try to log into the Pi and load the program, I get the error message which you can see in the attached picture. "Die dynamischen Module der C-Integration konnten nicht auf das Laufzeitsystem geladen werden" is german and means roughly "the modules from the c-integration could not be loaded onto the runtime system." Is this normal? Am I doing something wrong? I will have a look at the unix domain socket thing next, as I am still in the process of finding the best solution for the communication.
Last updated: 2024-02-15

Post by dtamm on How to read string from CharBufferPtr? ^{CODESYS Forge talk (Post)}
I am trying to implement a mechanism to send alarm SMS. For this, I have created an Alarm Class with a Notification Action which calls a POU. This POU implements IAlarmNotifiable making it selectable in the Alarm Class configuration. IAlarmNotifiable has an Execute method which is called by the alarm class. Now, I want to extract the alarm message of the triggered alarm. The Execute method comes with a VAR_INPUT itfAlarm: AlarmManager.IAlarm which supplies a method called GetMessage. The help text says: Returns the message text, that has been configured for the alarm. The result is a pointer to the buffer, where the message text is stored The type of the result is CharBufferPtr, and at some place I read that it can be interpreted as a pointer to string. But I cannot manage to extract the alarm message, all I get are numbers. I have tried the following: psAlarmText := itfAlarm.GetMessage(__SYSTEM.TYPE_CLASS.TYPE_STRING)^; sAlarmText := TO_STRING( itfAlarm.GetMessage(__SYSTEM.TYPE_CLASS.TYPE_STRING)^ ); So how do I get access to the alarm message as clear text? (In this case, "Larm 1")
Last updated: 2024-02-21

Post by squiggleypuff on RemoteTargetVisu creates Unresolved Reference ^{CODESYS Forge talk (Post)}
I have a project with a Festo CPX-E-CEC-C1-PN PLC (Run-time version 3.5.12.50) that I have been developing on just fine using Codesys V3.5 SP19 Patch 5 (64bit). I am at the stage where I wanted to use the Festo HMI screen, and have added a RemoteTargetVisu object to my application. After adding this object, I am no longer able to log in to the PLC as I get an Unresolved Reference warning for 'USERMGRUSERGETPROPERTY' towards the end of the download process. I was able to find this post (https://forge.codesys.com/forge/talk/Visualization/thread/fc686a6cb2/) where the two possible solutions are to "set the placeholder to emtpy" or update the runtime. Problem is, I don't know how to do either of these things, as I'm still very green in Codesys land. I'd be happy to update the Festo PLC runtime, as that seems like the better option, but have not had any luck in finding a tutorial for this online. If anyone could point me in the right direction I'd appreciate it.
Last updated: 2024-03-19

Post by leafy on Use third party actuator with IO-Link Master (IFM) ^{CODESYS Forge talk (Post)}
Hey there! I am currently doing a little automation project for uni. I am trying to integrate a control-valve-system (Buerkert AirLINE Field) in my IO-Link environment. With IFM sensors, I used their pre-built function blocks, but with this third-party device, i need to write my own function block. Thankfully, IFM provides a generic sensor-fb so I can write my own FB with "extends" and "super". So far, so good. I found the IODD and some other documentation and I thought I get how it works, but somehow can't really get it to work at all. From my understanding, i need to write data into the PDO-Array. But i get confused with the indices and subindices of IO-Link. I'll append the IODD and some screenshots of my project. There is an AOI for LogicXDesigner, but I can't use that in Codesys. I hope someone has integrated a IOL-device in Codesys before and can help me with this. Cheers leafy
Last updated: 2024-04-16

Post by leafy on Use third party actuator with IO-Link Master (IFM) ^{CODESYS Forge talk (Post)}
Hey there! I am currently doing a little automation project for uni. I am trying to integrate a control-valve-system (Buerkert AirLINE Field) in my IO-Link environment. With IFM sensors, I used their pre-built function blocks, but with this third-party device, i need to write my own function block. Thankfully, IFM provides a generic sensor-fb so I can write my own FB with "extends" and "super". So far, so good. I found the IODD and some other documentation and I thought I get how it works, but somehow can't really get it to work at all. From my understanding, i need to write data into the PDO-Array. But i get confused with the indices and subindices of IO-Link. I'll append the IODD and some screenshots of my project. There is an AOI for LogicXDesigner, but I can't use that in Codesys. I hope someone has integrated a IOL-device in Codesys before and can help me with this. Cheers leafy
Last updated: 2024-04-16

Post by rabaggett on Reading Named Pipes in Linux Is there a better way? ^{CODESYS Forge talk (Post)}
I have a Python program that will handle things in my application such as VISA over IP and Telnet control of instruments. I want the main control and HMI in Codesys. My problem is communication between the two. I have looked at several ways to accomplish this, and settled on having the Python program create two named pipes, one to send information to Codesys, and one for Codesys to send information to Python. The information would be packetized with \n for end of packet.. Seems simple. I think the named pipes method should work, but file reading in Codesys using the CAA file library starts to get difficult when the file is never ending, as in this case. Before I spend too much time making something that may be fundamentally flawed I want to ask. Is there a better way? Is there a way to read the file 'one line at a time' which might solve my never ending file problem? Thanks!
Last updated: 2024-05-09

Post by kaotic2499 on Upgraded Raspberry 2b to Raspberry 5, Trends Broken? ^{CODESYS Forge talk (Post)}
Hello! Raspberry pi 2b just is getting a bit slow so decided to go for a Raspberry 5. Project is now upgraded to suit Pi 64 SL... so, now although everything runs perfectly... for some reason my trends will not save! its driving me nuts... ^Tried merging tasks with main program & trends ^tried re-prioritizing tasks (shifting 1 - 31 etc) ^Recreated the Trend Recording manager from scratch ^Tried swapping persisitant vars to GVL Retains then non-retains... (Project attached is as per before trial&error) Raspberry Pi 2b still runs "perfectly" though its very chuggy (Still saves the trends, note this is of an pretty much identical project minus the device compatibility) Does anyone have any advice to offer? project attached.... I feel it could be outside of Codesys itself causing the issues, but cant see/find anything on the internet to assist (or anyone else with the same problem as me...) Can attach project in another format (non archive) any assistance is much appreciated!
Last updated: 2025-10-19

Post by manuknecht on XY Chart causes extremely long cycle in Visu Task ^{CODESYS Forge talk (Post)}
I am using the visualization element "Cartesian XY Chart" in a visualization template within a library to display recorded position values. I managed to configure the chart as desired and it displays the values like it should. A problem occurs when clicking on the chart to move the cursor, zoom or pan. Upon clicking the visualization element for the first time, the task in which the visualization is run spikes to a cycle time of around 5'000 to 15'000 ms (the configured cycle time is 100 ms). Sometimes this even completely crashes the web-visualization. After this very long cycle, the visu task normalizes again and the chart can be interacted with as usual. Another spike in cycle time occurs once the visualization is switched to a frame that does not contain the chart. I did reduce the data array to only a few values and tried changing the update behaviour of the chart, but it did not change the problems I am facing. Did anyone experience a similar issue or even has a solution for this?
Last updated: 2026-06-16

Post by fajean on Issue with library updates ^{CODESYS Forge talk (Post)}
We make heavy use of internally developed libraries, which are often nested on multiple levels. I routinely work simultaneously on several libraries along with a project that use them. I make changes to a library and immediately perform a download (online or otherwise) in the project. For the longest time, we had zero issue with this. But starting a good while back, with 3.5 SP19 I think, CODESYS started not noticing library updates in other instances most of the time. When the update is missed, the project sees no need to update the code, and any download ignores the new code. A "Clean all" does not solve the issue. But if I close and then re-open the project, then the new version is noticed and the download works. The other solution is saving the library to the registry multiple times (say, 20-30 times, less if lucky), and then at some point the project notices the changed library. I am now on SP21, and it is still not fixed. This is driving me mad, any tasks probably takes me double the time or more due to this problem. My colleague has the same problem on a separate computer. Is this a known issue? Is there a setting somewhere that changes how updates are checked? Thanks for any help!
Last updated: 2026-02-13

Post by suyash on Device User Logon ^{CODESYS Forge talk (Post)}
Hello. Basic Info : I am using Codesys Control For Raspberry Pi SL. Version 4.4.0.0 Engineering version : CODESYS V3.5 SP19 Patch 1 (Its a old application) I am facing a difficulty with the "Device User Logon". The window (screenshot attached) pops up during login. When i enter the credentials (which i feel are correct), the windows pops up again no matter how many times I enter. To ascertain, I tried entering the incorrect credentials during which its clearly specifying that i have entered them incorrectly (which is why I am quite certain about the credentials being correct). I even tried going into Communication Settings > Device(drop down) > Change Runtime secuirity policy . However it again asks me for credentials which keep popping up again and again. I am thinking of upgrading the runtime to the latest version of 4.20 Will it cause any issues with the paid license? Please suggest me a solution. BR, Suyash
Last updated: 2026-05-13

Post by pierre123 on User management - User Tab missing ^{CODESYS Forge talk (Post)}
i had the same problem. Thanks you for the response.
Last updated: 2023-08-25

Post by kumareasu on Code Size ^{CODESYS Forge talk (Post)}
Is this "Application Based Licence" is applicable for CODESYS Control RTE SL
Last updated: 2023-09-08

Post by eschwellinger on Correct CAN Driver for EL6751 ^{CODESYS Forge talk (Post)}
which plc Linux based or Windows plc?
Last updated: 2023-09-20

Post by eschwellinger on Webvisu NO load ^{CODESYS Forge talk (Post)}
check the plclogger for this situation
Last updated: 2023-09-21

Post by sukrit on What licenses are required for runtime on raspberry pi cm4 ^{CODESYS Forge talk (Post)}
attached is the software matrics
Last updated: 2023-10-17

Post by kimcuong on Profinet Deivce SL ^{CODESYS Forge talk (Post)}
How to get license trial Profinet Device SL in Codesys for beckhoff
Last updated: 2024-07-05

Post by timvh on Python API for GIT extensions ^{CODESYS Forge talk (Post)}
https://content.helpme-codesys.com/en/CODESYS%20Git/_git_using_scripting.html
Last updated: 2024-08-29

Post by damian177 on Codesys Control for Linux SL ^{CODESYS Forge talk (Post)}
everything works well.
Last updated: 2024-09-08

Post by eschwellinger on codesys VLAN tagging ^{CODESYS Forge talk (Post)}
no we'll an example for it but need some time.
Last updated: 2024-09-09

Post by talhaali on Persistent / Programme change ^{CODESYS Forge talk (Post)}
Hi, did you get any solution for this.
Last updated: 2024-09-10

Post by abauza on Type mappings in Datasource ^{CODESYS Forge talk (Post)}
Hi I have the same problem, any solution for this? Thanks
Last updated: 2024-09-12

Post by jinlee on Camera Feed (CCTV) ^{CODESYS Forge talk (Post)}
Hi, Thanks for the information. However, I can't download the associated project.
Last updated: 2024-09-12

Post by paulpotat on Can't open license manager with raspberry CM4 ^{CODESYS Forge talk (Post)}
Hello eschwellinger, Thanks for your answer, with this I was finally able to make it work by doing the following : install CODESYS Control for Linux ARM SL v4.13.0 uninstall CODESYS Control for Linux ARM SL v4.13.0 and make sure to select "yes" when prompted to uninstall WIBU CodeMeter Lite Runtime (v8.10.6230.501) re-install "CODESYS Control for Raspberry Pi SL" v4.13.0 It looks like the issue was probably related to the CodeMeter Runtime ? Best regards
Last updated: 2024-10-16

Post by koppit on Network Topology Required for CODESYS Redundancy over EtherCAT ^{CODESYS Forge talk (Post)}
I'm struggling with the same issue.
Last updated: 2024-11-01

Post by timvh on Network Topology Required for CODESYS Redundancy over EtherCAT ^{CODESYS Forge talk (Post)}
See the attached picture.
Last updated: 2024-12-04

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