Post by thejesh on WebVisu: switch-frame destroys and rebuilds referenced visualization - is retention configurable? ^{CODESYS Forge talk (Post)}
Hi, HTML5 Conrtrol elements on CODESYS V3.5 SP22 Patch 2, WebVisu only (no TargetVisu). The client is Chromium 147 in kiosk mode on a Raspberry Pi CM5 panel; the runtime is CODESYS Control Win V3 x64/CODESYS Control RTE V3 x64 on a separate IPC. I have measured that changing a Frame element's switch-frame variable destroys the currently referenced visualization and fully rebuilds it on return, including all embedded HTML5 controls. We would like to know whether this lifecycle is configurable. Measurement 1: Curently, our production page contains a good number of custom HTML5 controls and will only increase , each of which the WebVisu client instantiates as a separate about:srcdoc iframe. I counted live targets via the Chromium remote debugging endpoint (curl http://localhost:9222/json/list) before and after switching. Production displayed (index 0) 108 iframes Switched to a light page (index 1) 46 iframes Switched back to Production 108 iframes 62 controls are destroyed on leaving the page and re-instantiated on return. Observed latency was approximately 2.5 -5s away from the heavy page and approximately 4.0 -5 s back to it. This was measured with the panel otherwise idle: 2.8% system CPU, 97.1% idle, 2 h 56 min uptime, no remote-desktop session running, hardware acceleration confirmed active in chrome://gpu. I had previously measured the same behaviour under a much higher CPU load and have since resolved that load separately (VISU_TASK cycle period), so I am confident the rebuild is the frame lifecycle itself and not CPU starvation. Measurement 2 — frame offset instead of switch index I then displayed the same overlay page by a different mechanism. Instead of using a switch-frame index, I placed the page in a fixed Frame parked off-screen below the visible canvas, and drive its Y offset from an INT in Structured Text to move it into view. With this approach the overlay appears immediately, the production page underneath is never torn down and keeps updating, and no visualization is destroyed or rebuilt in either direction. The iframe count does not change at any point. This is the same visualization, containing the same HTML5 controls, as in Measurement 1 — the only difference is how it is brought on screen. So the rebuild appears to be a property of the switch-frame mechanism specifically, not of the page or its control count. Questions: Is the destroy-and-rebuild behavior on switch-frame the intended and documented lifecycle for WebVisu? Is there any setting, property or client option that causes a referenced visualization to remain instantiated when it is not the active index — the equivalent of keeping it mounted but not displayed? Does the runtime or client offer any form of caching or pre-instantiation for referenced visualizations, so that a return switch does not pay the full construction cost? Is the cost specific to HTML5 controls, or would the same rebuild occur with an equivalent number of native visualization elements? We ask because it would inform whether reducing our HTML5 control count is a viable solution. Is there a recommended pattern for showing a full-screen page over a live production screen without tearing the production screen down? My current workaround is to keep every page permanently instantiated and move it on and off screen by driving a frame offset variable, which avoids the rebuild entirely but means every page stays live and consumes client resources for the life of the session. This works, but I would prefer to use the supported mechanism if one exists. Any help on this is greatly appreciated. Thank you!
Last updated: 2026-08-07

Post by siscu on Raspberry i2c master device ^{CODESYS Forge talk (Post)}
I want to implement an extended I2C master for Raspberry Pi Control. I was hoping for it to be as easy as creating a library with a FB that extends i2cMaster and associating it with a device following the forge drivers documentation, but I haven't managed to make it work as the driver behaves only as an i2c slave. I'm thinking this is because the forge forum only talks about extending i2c, and the master portion is omitted since most users won't want to add a custom one. I'd like to know if I'm doing something wrong. Is it really possible to make an I2C master extension device? If so, are there public examples we can check out? Any info on this topic will be appreciated.
Last updated: 2024-10-16

Post by timvh on How to manage soft container licenses for (remote) multi units? ^{CODESYS Forge talk (Post)}
You need to activate an individual license (ticket number) for each device. THe hardware of each device is unique, so you cannot copy a soft container from one device to another. This license can be installed in a local (wibu - codemeter) soft container, or you could optionally activate it on a hardware (USB) key. The benefit of the key is that you can easily move it to another device, nor does it get lost when you replace parts of the hardware of the device or completely overwrite the image. See: https://store.codesys.com/en/codesys-key.html
Last updated: 2025-04-08

Post by mdetrana on VPLCs Tab 'Grey-ed Out', Cannot Create VPLC ^{CODESYS Forge talk (Post)}
When evaluating Codesys functionality, I found that the VPLC tab under Deploy Control SL > Operation > VPLCs is 'grey-ed out', see attached image. I'm trying to evaluate how my infrastructure will interact with Codesys on a Raspberry Pi 4, so I'm trying to demo running it before purchasing licenses. I was going through the Codesys tutorial here, and it never shows the tab as grey, so I do not know how to proceed. Let me know if I can get any additional information that can help. This could be related to an Info message that's sent when connecting- [INFORMATION] Connected successfully! [INFORMATION] Successfully connected to target (<ip_address>) [INFORMATION] No supported container engine found on device. You have to install a supported container engine to use Virtual Control. Please contact the Administrator of the device. [INFORMATION] Finished reading device information</ip_address> I'm not exactly sure what I would need to do to install a 'supported container engine'.
Last updated: 2025-10-09

Post by hyys12 on CODESYS 3.5 dicovery of PLC modules ^{CODESYS Forge talk (Post)}
I would say that I kind of got an explanation though this document on the WAGO PLC. https://techdocs.wago.com/io-system/750_753/system/en-US/index.html#92248203
Last updated: 2024-12-11

Post by tk096 on Sm3_math ^{CODESYS Forge talk (Post)}
Hi, SM3_Math is actually an internal library of SoftMotion. You can use it. The only restriction is that there is no compatibility guarantee - meaning that POUs in the library may change their interface, get moved/renamed/removed... in future versions of SoftMotion.
Last updated: 2025-03-19

Post by dkugler on Ramp function ^{CODESYS Forge talk (Post)}
The util.RAMP_INT and util.RAMP_REAL from Codesys have an input for the start value. What is the advantage of this OSCAT ramp instead of the Codesys util lib?
Last updated: 2024-01-10

Post by pouyavakili on Execute Codesys Tests with python ^{CODESYS Forge talk (Post)}
Thank you for your input! What I'm ultimately trying to achieve is automated test execution as part of a CI/CD pipeline (e.g. in GitLab or Azure DevOps). For this, I need to: Open a CODESYS project via script Build the project Run the Test Manager tests from a .TestRepository.xml Collect test results (e.g., pass/fail + a report) Exit with a proper return code (for pipeline success/failure) To integrate this into automation, I’m using the CODESYS scripting engine via Python (headless), but the issue is that the get_testmanager() function isn't available on the project object — even though Test Manager is installed, licensed, and works interactively in the IDE. Are you suggesting that I should: Use the Test Manager GUI to script the logic with its internal scripting language? Or is there a way to launch the Test Manager in headless/scripted mode, while still being able to control things via Python? If there's a supported way to automate tests with the Test Manager using scripting, especially from pipelines or headless environments, I’d really appreciate any pointers or example workflows. Thanks again!
Last updated: 2025-07-24

Post by steven-schalm on Github Actions CI/CD tasks - development topic ^{CODESYS Forge talk (Post)}
hello kevinrn, I've been looking for a solution to the CI/CD issue for a long time. Briefly about me... I am 32 and software architect for Codesys V3 and fullstack dev for web (VueJS, NestJS) in a small company in Erfurt (Germany). https://www.rex-at.de/. Through my web part, we already have CI/CD running well via GitLab (YAML-based configuration file (.gitlab-ci.yml), which defines which pipelines and jobs are executed when certain events occur) with everything you know. Stages for npm packages - prepare (GitVersion, npm install or whatever) - build (vite, tsc or whatever) - testing (vitest, jest or whatever) - deploy (npm packages) And similar for monorepo's or backend services (in NestJS) as DockerImages. For Codesys we have been building an OOP framework for years (~50 libraries now), which is currently managed via SVN and a specially written Svn-Watcher (in Python) gets commits and runs and builds everything together and deploys it to an FTP server and network drive. Why do we still have SVN? Because we are unfortunately still tied to the safety integration of Codesys and can therefore only go to SP15 at most with our controller/Eckelmann. But soon there will be an update and there will be no more obstacles to using Git. Hence my questions: 1. the basic idea is to run a local Windows Runner on some machine? 2. install Codesys on the machine where the runner is running? 3. powershell & python scripts are then used to execute builds (compile, build, sign libraries) & deploys? 4. can the Github action also be used in GitLab? ChatGPT has already told me that it's not the same, but it doesn't hurt to ask. Do you have any ideas on this? Greetings :D
Last updated: 2024-08-20

Post by chris12345 on Calling OPC UA Methods from UaExpert ^{CODESYS Forge talk (Post)}
Hi, Is it possible to generate an .xml file with FBs and methods from Codesys? Or do I need a separate program to generate the .xml file? Or is there a otherway to use methods via opc ua from the own project?
Last updated: 2023-09-20

Post by installwhat on No connection to target: An existing connection was forcibly closed by the remote host ^{CODESYS Forge talk (Post)}
Worked for me too. Now I have to find out why I didn't need to do this on very similar systems and what the security issue is
Last updated: 2024-08-11

Post by konstantinoskr on AXIS Rollover ^{CODESYS Forge talk (Post)}
Hello, I have an application with 2 axis. The master axis will be configured as Modulo. During motion i want to be able to change the rollover position if required. How is it possible to do this?
Last updated: 2025-03-11

Post by eschwellinger on Codesys Control for Raspberry Pi 4.10.0.0 - Raspberry Pi OS > 2023-12-05 ^{CODESYS Forge talk (Post)}
-> which PI? PI5 will be added to 4.11.0.0 version/release -> 2. on Raspberry PI OS lite - there seems to be an additional problem we will try to fix it too... till release.
Last updated: 2023-12-12

The element of type 'VisuFbElemImage' could not be updated. Reason: Index was outside the bounds of the array. ^{CODESYS Forge talk (Thread)}
The element of type 'VisuFbElemImage' could not be updated. Reason: Index was outside the bounds of the array.
Last updated: 2026-01-27

Post by cillian on Error when opening HTML5Control Editor ^{CODESYS Forge talk (Post)}
Hello, I am new to this forum so apologies if this is posted in the incorrect area. I am getting an error when trying to open the HTML5 Control Editor - this was working fine previous days. I am using Codesys V3.5 SP20 Patch 3. I have reinstalled the application. Below is a screenshot of what shows when I attempt to open HTML5 Control Editor. Would anyone know the solution to rectifying this problem? Thanks in advance. Edit: This is now fixed.
Last updated: 2024-10-22

Post by pernockham on Inheritence of struct, ^{CODESYS Forge talk (Post)}
Apparently my construction will not work as any of the sub-types are not be able to accept any (further) value-initiation. Ie: string_item : log_data_base := (string_value := 'test', val_type := STRING_); is not eq to (the string_value will not be assigned): string_item_2 : log_data_string := (string_value := 'test'); Because effectively for the compiler this is eq. to a "double" assignment where the compiler sees only the first assignment (my guess). string_item_2 : log_data_base := (val_type := STRING_) := (string_value := 'test'); Im not sure this should be treated as a bug, but it would surely be nice to be able to use this construction (compiler is 3.5.20.40). Anyone see any other alternative for solution (other than 4 complete STRUCTS with all fields individually defined)?
Last updated: 2025-03-07

Post by tk096 on High Cycle Times for SoftMotion_PlanningTask when using AxisGroup ^{CODESYS Forge talk (Post)}
Hi, under this circumstances the performance of a Raspberry Pi 4 should be sufficient to run a Softmotion robotics application. A closer look at the project would be required. Maybe you could contact the codesys support? Usually it is recommended to run the planning task cyclically every 2ms with task priority of 0 on a dedicated core. In the task configuration you can have a look at the average and maximum execution time of the planning task. You could use the function block SMC_TuneCPKernel (https://content.helpme-codesys.com/en/libs/SM3_Robotics/Current/SM3_Robotics/POUs/AdministrativeConfiguration/Computation/SMC_TuneCPKernel.html) to define suitable values for the parameters 'fSyncBufferDuration' and 'fPlanningInterval'. However, as previously mentioned, the performance of a Raspberry Pi 4 with realtime patch should be sufficient. The 'fPlanningInterval' parameter specifies the maximum planning step width in seconds. The cycle time of the planning task should not permanently exceed this value. A higher value reduces the computational effort, but can lead to a violation or no full utilization of the set limit values for velocity, acceleration and jerk. From a starting value of 0.016 seconds, the value should be increased gradually until the performance is acceptable. The parameter 'fSyncBufferDuration' specifies the size (in seconds) of the buffer between the planning and fieldbus task. The cycle time of the planning task must not exceed this value at peak times (this will lead to the error SMC_CP_QUEUE_UNDERRUN). A higher value can compensate for peaks in the cycle time of the planning task. At the same time, however, this also increases the latency for executing interrupts and aborting movements.
Last updated: 2024-03-22

Post by dekelec on Codesys 2.3 & Peak PCAN ^{CODESYS Forge talk (Post)}
I use Peak USB adapter daily to download from CoDeSys 2.3 and 3.5 to IFM, EPEC and other controllers. The process: - First you need to install the appropriate driver. Link: https://www.peak-system.com/Drivers.523.0.html?&L=1 - Restart the computer - Start the CoDeSys application - Change the name of the adapter in Communication parameters, as mentioned in previous comment. Write the name exactly as written "Peak_USB", as it could also be case sensitive (defines which .dll file to use). If this doesn't work I would contact the vendor of the controller to find out the procedure. In the attachment I've added a FAQ document from IFM regarding using PCAN USB. P.S. I've noticed in your picture of communication parameters a channel via TCP/IP is mentioned. In this case a USB to CAN connection is not being used. First you should change the channel/gateway to connect via CANbus or connect using an Ethernet cable.
Last updated: 2024-07-09

Post by mecmag on gear over gear (2 masters,1 slave) - how to do it? ^{CODESYS Forge talk (Post)}
Hello, i need to create an application that uses 2 masters, with 2 different ratios, and it outputs in one single slave. I explain better: Imagine axis A, B and C. -Axis A is the slave. -Axis B is master of A, with a specific ratio. -Axis C is master of A, with a specific ratio. the result motion from B and C should be executed by A, proportionally in position and ratios from B and C. With standard softmotion libraries (MC_...) it is not possible (i couldn't) because it is allowed only one master with its ratio. I have made a similiar application in past, using MoveOverGear in order to synch gears before engage. Instead this time, i need to do a gear over gear application, using 2 different masters. The position have to be the sum of both masters (considering their ratios). Any clue about how to do it? Or were to find some FB that can do it?
Last updated: 2024-08-16

Post by t-probst on Strong Private Key Protection for Encryption Certificates ^{CODESYS Forge talk (Post)}
Hello, We are trying to implement an automated method of adding of a certificate and private key to the Windows certificate store for encrypting CODESYS projects. We want to do this so that users do not have to deal with details of certificates at all and to prevent user error. We are keen on enforcing strong private key protection since it ensures that a password is required for the certificate to be used to decrypt a CODESYS project. When we add a certificate to the certificate store and enable strong key protection using the Microsoft Management Console Certificates snap-in, it works as expected. However, through this method the user may mistakenly not enable strong private key protection. For the certificates we create programmatically (using Microsoft’s Cryptography Next Generation API in .Net 7) bag attributes are added to the certificate and key by the API. These bag attributes are as follows: Bag Attributes localKeyID: 01 00 00 00 subject=C = xx, ST = xxx, O = xxx, OU = xxx, CN = xxx issuer=C = xx, ST = xxx, L = xxx, O = xxx, OU = xxx, CN = xxx -----BEGIN CERTIFICATE----- [encoded certificate] -----END CERTIFICATE----- After using this certificate with bag attributes to encrypt a CODESYS project, it can’t be decrypted, showing this error: "The specified project could not be loaded. Possible reasons might be: - The project file is corrupted or invalid - The project has been saved with a newer version of the programming system. If this is the case, you can open the project in the corresponding version. Choose "Save as..." with the appropriate storage version, and retry again. - You may not have the necessary permissions to lad the project" We know that the bag attributes are causing the issue because if we manually edit the certificate file to remove them before using the certificate to encrypt a project, the project can be decrypted as expected. However, we are unable to automatically enforce strong key protection using this method. Here is a link to a StackOverFlow question that we have posted recently for this issue: https://stackoverflow.com/questions/76922355/enforcing-strong-private-key-protection-for-x509certificate2-objects-in-net-mod Any help is greatly appreciated.
Last updated: 2023-08-22

Post by kareem-pt on Velocity is too low even though correct value is reported ^{CODESYS Forge talk (Post)}
Hello, I'm playing around with a single axis. I've setup scaling and set the drive to move 360 degrees in the commissioning tab. The axis does move 360 degrees, but it moves much slower than the 360 degrees per second that I set for the velocity. It seems to be about 3 times slower (taking about 3 seconds instead of 1). This is despite the set and actual velocity both being displayed as 360. The acceleration, deceleration and jerk are all set to very high values. I'm just running this on my PC, using demo mode (no license purchased yet). I've attached a video showing the problem. Does anyone know what the problem could be? Thanks
Last updated: 2025-06-06

Post by tvm on Web Client (HMI) Disconnects from Webvisu (Weidmuller u-OS) ^{CODESYS Forge talk (Post)}
ok, that's different than our issue then. We're using Schneider Electric M262 PLCs, and we've had it where certain web browsers cause the web server to only allow https connections, but it's not recoverable with a refresh. It usually requires a power cycle or even a full firmware flash. Your issue might have more to do with the timing. I don't know if it helps you, but we normally run our visu task at 200mS, with an update rate of 200mS. Seems to work. I went through this: https://faq.codesys.com/pages/viewpage.action?pageId=112525371 but it really seems like trial and error.
Last updated: 2023-09-06

Post by monteta on Automation without UI ^{CODESYS Forge talk (Post)}
Hello all, there is my problem. i have a project on a PC A who work properly, I aim to take this project and place it on a Pc B with a blank Codesys installed. All seemd to work, the project is created on the PC B, i create my with with online.create_online_application(project.project.active_application) recover my onlineDevice and try onlinedevice.connect() so that i can use create_live_user_management() but then a problem occure on my connect() saying gateway not configured properly. I have setted my set_credentials_for_initial_user(). when i use the Ui, there is absolutely no problem. an other question, is it possible to use the Start and Stop PLC of codesys Control Systray directly in my python script? So that if it detect that it's stopped, then he automatically start it?
Last updated: 2025-09-25

Post by superjojo2002 on Licensing info not available. ^{CODESYS Forge talk (Post)}
If support for a containerized CODESYS runtime with a license isn't feasible, then I've considered an alternative approach: I've purchased and activated a "CODESYS Control Basic S" license on my Windows notebook, where I already have the Codemeter Control Center installed. Upon activation, I can see the CODESYS license as active on my notebook. Subsequently, I followed the instructions provided in this link (https://faq.codesys.com/display/CDSFAQ/How+to%3A+Setup+a+Wibu+Network+Server+Access+for+Licenses) to configure the Wibu runtime in the CODESYS container to access my external license server hosted on my notebook by editing the CODESYSControl_User.cfg file accordingly. However, it's worth noting that I'm still receiving a response from the Licensing Manager indicating that the runtime is persistently searching for a dongle instead of recognizing the soft container. So how can I get my runtime licensed now? Any ideas?
Last updated: 2024-03-20

Post by r-niedermayer on Issue with WebVisu on Raspberry PI ^{CODESYS Forge talk (Post)}
Regarding to your application: When clicking in the web visualization, the boolean variable will be tapped for both buttons. The LED in the web visualization lights up as long as the variable is true The used variables should come from the GVL, ad/or thePLC_Prg. We see no difference or problem in both projects: You have created a visuelement Push button a a tapper, that is supposed to control the variable in this way as expected. This is also reflected (switching Bool from false to true) in the program code, as well as in the (GVL declared) variables. Wherever the misunderstanding comes from: no, this is not memory or license related. Our best guess: it is probably more of an applicative/conceptual implementation.
Last updated: 2024-04-11

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