Post by alberto on ExportPLCopenXML is failing ^{CODESYS Forge talk (Post)}
I'm trying to export my whole project through the option ExportPLCopenXML. It seems working, but when I'm trying to import the xml I have the following error during the importation process: Object reference not set to an instance of an object. It seems a usual issue with this process that affects to the pointer to user classes inside a procedure. I receive this error for two general functions that have this pointer declarations in the VAR_INPUT section. It seems a bug into the export/import process of CodeSYS and I couldn't skip it so far. Anyone could help me? Thanks in advance.
Last updated: 2025-03-15

Post by r-c-r on SM3RaspiStepper 0.0.0.6 issue ^{CODESYS Forge talk (Post)}
Hello, I noticed that version 0.0.0.6 is now available, so I tested it using CODESYS V3.5 SP19 Patch 7 and SoftMotion 4.17.0.0. While the project compiles and downloads without issues, I encountered a problem with the 'Enable: GPIO pin number that is set when the axis is enabled (with MC_Power) (0: not used)' functionality — it no longer works (HIGH level not present at the output pin). I observed the same behavior with version 0.0.0.5, whereas version 0.0.0.4 functions correctly. Could you help me identify what might be causing this issue or suggest how to resolve it? Thanks.
Last updated: 2025-03-19

Post by beginner on ERROR: Demo mode for SoftMotion Basic expired. Feature stopped! ^{CODESYS Forge talk (Post)}
Hello. Please help me. Sometimes SoftMotion starts in demo mode and stops working after 2 hours. When I check with the license manager, it is recognized normally. I checked the log. After changing online or logging in with a download, the message "**** ERROR: Demo mode for SoftMotion Basic started. Will expire and stop!" was left. Even if you change online or log in with a download, this phenomenon may not occur. Please tell me how to solve this problem. Thank you in advance. Codesys Ver 3.5.20.0 SM3 Basic SoftMotion Ver 4.16.0.0 ※This text was translated using a translator.
Last updated: 2025-03-25

Post by madskaizer on ModbusTCP Slave Device, maximum uiClientConnections? ^{CODESYS Forge talk (Post)}
I got a Wago PFC200V2, running Codesys 3.5.16.40, 100ms scan cycle, consumes about 20ms. It will randomly crash the runtime every 10 minutes to a few hours. We suspect an overloaded ModbusTCP Slave Device, as this is work done by a 3rd party contractor, but we can not find anything in the help files or documentation, that mentions a hard limit on maximum number of clients connections. This PLC currently has 44 client connections to the Slave Device and 29 slaves configured for its own Master Device. This topic metnions a hard limit of maximum 16 connections, but where is this written? https://forge.codesys.com/forge/talk/Engineering/thread/bd95b9d6d2/
Last updated: 2025-03-26

Post by imdatatas on Programmatically change Tappet on a cam ^{CODESYS Forge talk (Post)}
Yes, There is. As explained "Manual creation of CAM structure" on below section. Likewise tappet structure also can be create manual and value of the switching point can be change during IEC program running. https://content.helpme-codesys.com/en/CODESYS%20SoftMotion/_sm_basic_cam_programmatic_creation.html Just create a cam table and define some tapped points as sample for your project. Then on project compile, the created cam tapped data is converted internally into a global variable list. By clicking "Display generated code" in the "cam editor", you can display the automatically created global variables for both cam & tappets. Regards, Imdat
Last updated: 2025-04-02

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 rossanoparis on Internal Error (ARM): Unsupported conversion! With new version v3.5 SP21 ^{CODESYS Forge talk (Post)}
I have updated CODESYS development tool to the version v3.5 SP21 (64bit) The previous version was v3.5.20.40 Compiling an existing application with the new evelopment tool I get the following error. kunbusiodrvrevpibridge, 1.4.1.0 (kunbus gmbh): IoDrvScanModules [IoDrvRevPiBridge](Line 51, Column 1 (Impl)): Internal Error (ARM): Unsupported conversion! This error was not reported in the previous compiler version and is now highlighted in a third-party library, which I cannot change or modify. The error is due to the following conversion: m_udiError := TO_UDINT(excCode); . The excCode variable is a system type, declared as shown below, and should be converted to a UDINT excCode : __SYSTEM.ExceptionCode; m_udiError: UDINT; . I would appreciate it if someone could provide feedback on this issue.
Last updated: 2025-04-15

Post by kut69 on Retain / Persistent Variables in Codesys for Raspberry Pi ^{CODESYS Forge talk (Post)}
Hi, I am interested in details about the .ret file in the filesystem. I have already a project where the file is used (write on demand, read by start) and I want to share it as 'default input' for test devices using the identical application. Opening the .ret file content in a hex editor (I only use a single string retain var) I asked myself what the meaning of the first 24 bytes is. It neither contains a handle to the application nor a reference to the variable. Is this maybe a timestamp? Or a CRC/checksum? Regards, Thomas
Last updated: 2025-05-19

Post by george32 on Learning ST in an object-oriented way. ^{CODESYS Forge talk (Post)}
Dear all, I am currently creating a program in the ST language. Because the program is starting to grow nicely I would like to switch to a more object-oriented way of programming. (Like for example in Python). By surfing the internet I found out that Function Blocks is the best method for this. Now I would like to delve further into this, with all the possibilities that Function Blocks have only I cannot find a clear course, explanation of what everything is around the function block thing and how to approach everything. I find the standard documentation around Function Blocks rather abstract and the examples are minimal. Therefore I am looking for a page/course/document explaining object oriented programming in Codesys (or other PLC programming environment). Do you have any recommendations on this?
Last updated: 2025-06-10

Post by levih on FbHTTPs_Get how to get data from a website and use it in codesys ^{CODESYS Forge talk (Post)}
You get an array of DWORD into your receive buffer. You need to process this into usable data, before you can fit it into your DUT. I've made it work using FbWrite_ToIEC_ByRule in stead of Fb_JSON_ParseAndModify. I've attached images of the code. You receive the data into ARRAY[0..1023] OF DWORD. Then you use that array as the input for fbWrite_ToIEC_ByRule. To get the output from this you define a rule to fit the expected data structure including nesting levels. The you feed the rule into FbWrite_ToIEC_ByRule and then you can set the output to be of your DUT type.
Last updated: 2025-06-16

Post by jeroenaero on Targetvisualisation full screen with CmpTargetVisu settings ^{CODESYS Forge talk (Post)}
Hi, How can i display targetvisualization in full screen on the target device? I installed Targetvisu For Linux SL 4.16.0.0 on target device which contains Raspberry PI 64bit PIXEL desktop. When i connect my PLC program to the remote targetvisu, the targetvisu displays for 60% horizontally. We contacted CODESYS and they said it is a bug. they had a workaround, and with the settings below added to the file /etc/codesysvisualization/CODESYSVisualizationTV.cfg, the targetvisualization display for 100%, but with the taskbar at the top. VisuClient.BestFit=1 ;VisuClient.ScaleTypeIsotropic=0 VisuClient.FillWholeBackground=1 [CmpTargetVisu] WindowPositionX=0 WindowPositionY=0 WindowSizeWidth=1280 WindowSizeHeight=800 WindowType=2 How can we let it display fullscreen without taskbar?
Last updated: 2025-07-24

Post by micik on Changed Device of Rapberry Pi to MC SL instead of standard SL and cannot connect anymore ^{CODESYS Forge talk (Post)}
I have a test application and use Codesys Control for Rasp Pi SL. I made a mistake and updated device from MSL to MC SL, and now if I try to go online with archived version of the project I gett error message that IDs are different between project device and target device. Of course, I can go online if I changed device in the project from SL to MC SL, but I'm not sure that is correct. So I have two questions: 1. What is the actual difference between MC SL device and standard SL device when it comes to raspberry pi 4? 2. What change I need to do on raspberry pi4 side to change device back from MC SL to SL? Thank you!
Last updated: 2025-08-05

Post by naci30 on Erreur bibliothèque WagoSysKbusTerminalControl et WagoSysKbusServices pour la gestion de la carte 750-671 ^{CODESYS Forge talk (Post)}
Bonjour, je suis novice, je rencontre un problème pour mon projet la gestion d'un moteur stepper. j’ai des erreurs dans mon code lié à la carte stepper et aux bibliothèques et je n’avance plus. J'ai joint les différentes captures d'ecran, j’explique ce que j’ai dejà fait fait : - j’ai isolé le code du stepper dans un unique projet afin de déceler d’où venait le problème afin de ne pas modifier totalement tout le projet. Ce que j’ai fait: J’ai supprimé les bibliothèques et j’ai réinstallé, j’ai les bonnes versions. J’ai supprimé le 750-671 du KBUS je l’ai réinstallé pareil. J’ai Nettoyé le code pour pouvoir le recompilé pareil. Je précise la version de mon codesys est : V3.5 SP21 patch 1 J’ai joint les différentes captures d’écran: les bibliothèques, le code de test, les 34 erreurs.
Last updated: 2025-08-11

Post by jzhvymetal77 on IecVarAccessLibrary.IBaseTreeNode methon ^{CODESYS Forge talk (Post)}
I got this code working again. 3S/CoDeSys, your level of obfuscation and lack of documentation turns a simple task into a monumental complex challenge. The issue was that at some point the IecVarAccessLibrary changed and no longer allowed using IBaseTreeNode to retrieve a child or the number of children. The attached code has been updated to use IIecVarAccess6.VarAccBrowseGetChildByIndex instead. The code was also cleaned up but is still a work in progress. The current example only works one layer deep. This means native data types, arrays, and single-layer structures are supported. However, structure arrays and nested structures are not yet supported.
Last updated: 2025-08-25

Post by antonz on CoDeSys v3.5: creating libraries for both 32-bit and 64-bit controllers ^{CODESYS Forge talk (Post)}
Follow up question: in the Project Settings, under Library Development, there is an option related to this: Check all Pool Objects -> Pointer size to use Options are: * 32 Bit * 64 Bit * 32 and 64 Bit The descriptions and online help suggest to me this is only relevant for checking and showing any incorrect pointer types as an error in the IDE. E.g. using a DWORD to store a pointer value on a 64-bit controller. It would not control the creation of either 32-bit or 64-bit compiled libraries. Is that correct?
Last updated: 2025-09-01

Post by voffi on projects.open not working for file based storage project ^{CODESYS Forge talk (Post)}
Hello! Opening a project from a python script given at the CODESYS command line does not work for me with a file based storage project. Example: Running projects.open("test.project", primary = True) works but converting the project to a file based storage project and then give the folder name as an argument to project.open Running projects.open("test.fbsproj", primary = True) does not work. We decided to work with file based storage for the project. Is there a scripting API for file-based storage to e.g. convert it while running the script back or how to open file based storage project with projects.open? Thank you! voffi
Last updated: 2025-09-05

Post by pernockham on Control for linux SL, 4.14.0.0 -> 4.15.0.0 breaks web page access. URL requires authentication ^{CODESYS Forge talk (Post)}
I have a problem which I have identified with a device-update from 4.14.0.0 to (4.15.0.0-4.17.0.0) where the newer versions will stop any local access to the internal web page with the browser responding "The requested URL requires authentication". Setting the device back to 4.14.0.0. the web page will respond. Access to web page through Automation server is possible also for the newer version, but not "local" access. Runtime (Codesys control for linux SL) is on 4.17.0.0. I have tried to manipulate settings for 'Access-Control-Allow-Origin' '*' always; through nginx (normally a proxy_pass to localhost:8080). Also tested bypassing nginx by accessing 8080 directly with the same result.
Last updated: 2025-09-08

Post by dkugler on Project loses 'Download time' information ^{CODESYS Forge talk (Post)}
and if you copy or transfer a project to another place, copy not only the .project, copy .compileinfo .bootinfo and .bootinfo_guids then we figured out it is more often possible to go online without full download. If you build an archiv and extract it, some of this files are missing and login isn't possible without download. I work with V3.5 SP16 Patch 4. I don't know if this problem of the archiv is solved in newer Versions/SP's and I don't know what the problem of Codesys is to help out a lot of programers of this very annoying problem or at least help with a workaround
Last updated: 2025-09-18

Post by alexgooi on Licensing info not available. ^{CODESYS Forge talk (Post)}
Dear Forum I have the following config: Codesys_IDE 3.5.20 Codesys_Virtual_Control 4.13 Codesys_License_Server 4.13 I know these are not the newest versions, but in my mind these should work. I have the same problem here. I have the license server installed on the host, and in the docker container(Codesys virtual control) I'm able to ping the license server. In the /conf/codesyscontrol/CODESYSControl_User.cfg I have added the following config: [CmpCodeMeter] EnableNetLicenses=1 LicenseServer.1="ip address of the host" I have tried it via the wbm web-page. I can create new license containers over there, but still no luck. I also have tried to run the docker container with the -s "server_IP" command. I have searched for some tutorial's but I couldn't find it. If anyone has some clue or can give me a push in the right direction it would be very very welcome!
Last updated: 2025-09-29

Post by alexgooi on Licensing info not available. ^{CODESYS Forge talk (Post)}
Thank you for your quick response, I have updated to the 4.17.0 (Virtual control and the license server). Now I am able to see the softcontainer from the Codesys IDE. But when I want to activate the license I get the following message: Licensing info not available. The device does not support this service (See picture). I then tried to active it via the WBM service like you suggested. But when I try this is get an error (see picture for error). I also tried to put RTS- in front of the serial number, but when I try this I get an error that the serial number is not correct. I think I'm getting closer, but I'm not there yet.
Last updated: 2025-10-01

Post by ouzago on ERROR C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr ^{CODESYS Forge talk (Post)}
When I created a new project in CODESYS using the "Standard Project" template and then added a Visualization, I was receiving the C0138 error during compilation. This issue persisted even with a new, completely empty project. A Quick and Effective Solution (My Method): After many attempts, I solved the problem as follows: From the File -> New Project menu, I selected the "HMI Project" template directly, instead of the "Standard Project" template. After creating the project with this template, I added my POUs, Tasks, and programs (e.g., Ladder, ST). Using this method, the project compiled successfully without any errors. So, my question is: are there any other solutions besides this method?
Last updated: 2025-10-07

Post by snhatton on OpC UA server on Raspberry Pi 64 SL runtime ^{CODESYS Forge talk (Post)}
Good afternoon, After changing the security settings to: CommunicationPolicy: POLICY_BASICSHA256SHA256 CommunicationMode: ALL Activation: Activated UserAuthentication: ENABLED Then generate a new certificate on the device for the OPC-UA server from Security Agent->Device->OPC UA Server. Restart the runtime using tools->Update Raspberry Pi->Stop->Start for the changes to take effect. It may take a minute for the runtime to start. Initiate the connection from the UA server side. You should see a pop-up asking you to trust the certificate. Click on the button 'Trust Server Certificate'. Next, you should see a certificate in the quarantined folder of the security agent in CODESYS. Click and drag this from quarantined to trusted and then try connecting from UA expert to the device. These steps worked for me and my setup and I hope they can help you!
Last updated: 2023-12-11

Post by royw on Profinet Library für C# ^{CODESYS Forge talk (Post)}
Hallo, ich weiß nicht ob ich hier richtig bin und ob es überhaupt möglich ist ... Ich suche eine Möglichkeit ein Profinet Device mit Record Read und Write anzusprechen. Eigentlich brauche ich nur sehr wenige Kommandos um unser Device zu konfigurieren. Das bedeutet setzen der MAC Adresse und einer Seriennummer. Das würden wir gern aus einem C# Programm herus machen. Nun sind wir auf der Suche nach einer Bibliothek o.ä. . Da man es ja auch aus Codesys heraus machen, dachte ich mir, gibt es eventuell eine DLL o.ä. die man dafür nutzen könnte. Wie gesagt wir wollen keine Realtime Abfragen der zyklischen Daten sondern lediglich Record read/write. Hat da jemand einen helfenden Hinweis ? Schon mal vielen Dank im Voraus
Last updated: 2023-12-22

Post by royw on Profinet library for C# ^{CODESYS Forge talk (Post)}
Hi, I don't know if I'm in the right place or if it's even possible... I'm looking for a way to address a Profinet device with Record Read and Write from my own PC. I actually only need very few commands to configure our device. This means setting the MAC address and a serial number. We would like to do this from a C# program. Now we are looking for a library or something similar. Since you can do it from Codesys, I thought there might be a DLL or something similar that you could use for this. As I said, we don't want real-time queries of the cyclic data but only record read/write. Does anyone have any helpful hint? Thanks in advance
Last updated: 2023-12-22

Post by dhumphries on Codesys device configuration ^{CODESYS Forge talk (Post)}
First make sure the programming laptop and HMI are both on the same subnet. For example if the IP address of the HMI is 192.168.1.125 with a subnet mask 255.255.255.0 set your laptop IP to 192.168.1.120 with a subnet mask of 255.255.255.0. Make sure the cables are fully connected (the ethernet port on my programming laptop will click once but the cable is not fully seated.) Make sure the HMI is powered on, try pinging the device from a command prompt, if you can't ping the HMI there is a network issue that has to be resolved first.
Last updated: 2023-12-30

Sort by relevance or date