Post by sb879 on Non-formal invocation of function blocks in CODESYS ^{CODESYS Forge talk (Post)}
Is it possible to do non-formal invocation of function blocks in CODESYS? I get an error when I try, see the attached pic. Also attached a pic from IEC 61131-3 describing non-formal invocations.
Last updated: 2025-12-04

Post by sb879 on Non-formal invocation of function blocks in CODESYS ^{CODESYS Forge talk (Post)}
Is it possible to do non-formal invocation of function blocks in CODESYS? I get an error when I try, see the attached pic. Also attached a pic from IEC 61131-3 describing non-formal invocations.
Last updated: 2025-12-04

Post by bruno-roth on Parker Compax3 controlled by Schneider LMC 201 ^{CODESYS Forge talk (Post)}
Hello, you could use any CODESYS PLC which has an EtherCAT master and the possibility to run the CODESYS Softmotion.
Last updated: 2026-01-13

Transparent wireless serial bridge for Modbus RTU – experience with LoRa/WiFi RS-485 link to CODESYS runtime ^{CODESYS Forge talk (Thread)}
Transparent wireless serial bridge for Modbus RTU – experience with LoRa/WiFi RS-485 link to CODESYS runtime
Last updated: 2026-03-18

Post by eschwellinger on codesys installer deletes itself instead of updating ^{CODESYS Forge talk (Post)}
I would try to use: https://store.codesys.com/de/codesys-installer.html this standalone version. Seems if your version out of SP19 setup have some update problem.
Last updated: 2026-08-11

CODESYS Control for Raspberry Pi 5 - "Hardware version or firmware version not supported" on Rev 1.1, persists across multiple runtime versions and OS images ^{CODESYS Forge talk (Thread)}
CODESYS Control for Raspberry Pi 5 - "Hardware version or firmware version not supported" on Rev 1.1, persists across multiple runtime versions and OS images
Last updated: 2026-08-11

Post by caualima on AI + Programming ^{CODESYS Forge talk (Post)}
What do you think about having an AI Agent specialized in ST programming in Codesys? I see this saving hours and hours of work for those who program on a daily basis.
Last updated: 2026-01-24

Post by yoeri on Python script: Launch Codesys, Execute Script, Exit Codesys ^{CODESYS Forge talk (Post)}
For whoever finds this old thread. Instead of System.exit(0), use system.exit(0) without capital 'S', this worked for me. I use these imports from future import print_function import sys import os
Last updated: 2026-02-12

Post by somlioy on Beckhoff ESI import german text ^{CODESYS Forge talk (Post)}
Solved. Had to explicitly select English inside CODESYS as language instead of system default, which for my case is norwegian... Open Tools → Options → International Settings Set the development-system language to English Restart codesys
Last updated: 2026-07-28

How to reset forgotten User Management / Administrator password on CODESYS Control Win V3 (V3.5 SP22 Patch 2)? ^{CODESYS Forge talk (Thread)}
How to reset forgotten User Management / Administrator password on CODESYS Control Win V3 (V3.5 SP22 Patch 2)?
Last updated: 2026-08-25

Post by rcaponi on Codesys 3.5 SP19 Patch 4. Trace context menu does not work ^{CODESYS Forge talk (Post)}
Hello, I'm using the new Codesys 3.5 SP19 Patch 4 version with CODESYS Control for Raspberry Pi MC SL v4.8. Compared to the Codesys 3.5 SP19 Patch 1 version, the context menu on a Trace object no longer works. So I can no longer run the Downloader Trace command. Do any options need to be enabled with the new version? Best regards Roberto Caponi
Last updated: 2023-10-24

Post by narius on OPC-UA object instances preexisting in imported xml information model ^{CODESYS Forge talk (Post)}
Hi all, is it possible to use object instances that are not instantiated by codesys itself, e.g. have been defined in UA-Modeler ? When I browse the plc with UA-Expert I see those instances, but I have not seen information in codesys or the web if these are writable in codesys. So far, I am under the impression, that it is not possible, but would like to hear from others. Also, is it correct, that it is not possible to create references inside codesys ? Thanks in advance and kr
Last updated: 2024-08-08

Post by spilin on All devices lost for all installed version ^{CODESYS Forge talk (Post)}
hello. After installing the latest version of codesys (3.5.20) from codesys installer, I had a problem. All my devices disappeared. Both PLCs and IO modules and network devices disappeared from my list. I browsed through the Windows files and I can find them in the programdata/codesys/devices folder. The files remain there, but they are not available within codesys (same error in all installed versions) which in this case are 3.5.16 and 3.5.19. Does anyone know how I can reimport or resynchronize my devices folder again? Thanks
Last updated: 2024-09-11

Post by dkugler on csv datei einlesen und verarbeiten ^{CODESYS Forge talk (Post)}
in der https://store.codesys.com/de/codesys-iiot-libraries-sl.html ist u.a. die CSV Utility SL Bibliothek incl. Beispiel enthalten. Die kostet etwas. Generell Codesys Beispiele findest Du hier: https://content.helpme-codesys.com/de/CODESYS%20Examples/_ex_start_page.html Alternativ file read verwenden und Zeit investieren um von Hand zu Fuß den Dateiinhalt zu durchforsten: https://content.helpme-codesys.com/de/CODESYS%20Examples/_ex_cds_file_utilities.html In der OSCAT Library gab es mal noch etwas, da könnte google weiterhelfen
Last updated: 2024-10-28

Post by smartcoco on Request a dark mode for CODESYS ^{CODESYS Forge talk (Post)}
CODESYS IDE is not a modern IDE. Its interface is ugly, its operation is not user-friendly, its functions are lacking, its feedback is slow, and its development is not good enough. In fact, CODESYS is a helpless choice under the current situation. But this situation will not last long. For example, SIMATIC AX is a strong competitor of CODESYS, which is more open and inclusive.
Last updated: 2024-12-03

Post by paulpotat on Can't find the safety manual in the documentation ^{CODESYS Forge talk (Post)}
Hello, I was browsing the "CODESYS Virtual Safe Control for Linux SL" documentation page, and it says the following : For more information about the development of safety-critical applications with CODESYS, see: * Safety Manual H1 – SafetyManual.pdf, which is stored in the directory ../<user>/CODESYS Virtual Safe Control Linux SL/Delivery/Manuals</user> What does this path refers to ? I can't find it in CODESYS installation directories. Best regards
Last updated: 2025-01-23

Post by alex2 on How to uninstall SVN module ^{CODESYS Forge talk (Post)}
Hello, At work, I use Codesys V3.5 SP10. I wanted to run some tests with the SVN module, which I kept installed (without actually using it in the end). However, when I tried to launch Codesys today, I was informed that a license was missing. I suspect that this is due to the SVN module. Could you tell me how to uninstall it without launching Codesys? (as i cant proprerly start Codesys without the license) Thank you in advance.
Last updated: 2025-02-25

Post by monw on Unable to Re-Import Native XML Exported Using CODESYS Script API ^{CODESYS Forge talk (Post)}
When exporting a Logical Device or Logical Exchange GVL using the native XML export functionality of the CODESYS Script API, I encounter the following error upon re-import: "Error in IEnumeratorOfTWrapper. Current. Could not cast: System.String in System.Char" I am using CODESYS V3.5 SP21 Patch 2. Is there a known solution or workaround for this issue? Notably, importing the same XML file through the CODESYS Engineering IDE's menu import works without error.
Last updated: 2025-09-12

Post by timvh on How to correctly create a device descriptor (.devdesc.xml) for a custom Linux ARM64 PLC in CODESYS 3.5.21.20? ^{CODESYS Forge talk (Post)}
If you are a vendor of controllers and want to have your own CODESYS Runtime on your device, then you need to contact the CODESYS Sales team and ask for the runtime Toolkit. For resellers of CODESYS devices, this can be interesting. If it is only for a few devices, then why not just take the standard runtime?
Last updated: 2025-10-07

Post by sumit on Not able to see input data coming from eip adapter on codesys ^{CODESYS Forge talk (Post)}
Hello there, I have an eip adapter running (remotely) that is sending data back to eip scanner (running on codesys). I can send data from scanner (codesys) to the adapter but not getting the data back from the adapter. I have verified the incoming data on wireshark but I don't see this data in the codesys. I have tried local variable mapping and global variable mapping not variable values just stays at 0. Please guide.
Last updated: 2024-02-29

Post by hismoon on CodeSys SVN funktionert nicht ^{CODESYS Forge talk (Post)}
Das CODESYS SVN AddOn hat Minimal-Versions-Vorgaben. In SP9 funktioniert wohl die neueste SVN Version nicht. Da mal am besten im Store auf die Release Notes auf der Download-Seite schauen. Da steht meistens, ab wann Minimal-Versionen erhöht wurden. (Required CODESYS version) V4.2.6.0 vom SVN AddOn scheint die letzte zu sein, die mit SP9 offiziell funktioniert. Eigentlich sollte das der CODESYS Installer / Package Manager abfangen, aber hmm.
Last updated: 2024-06-04

Post by timvh on HTML5 visualization controls disabled on CODESYS Control for Linux SL - overlay not supported? ^{CODESYS Forge talk (Post)}
I would suggest to install the latest visualization and visualization add-ons. Go to Tools - CODESYS installer to updates these add-ons (or just start the CODESYS installer through the Windows start menu). After installation, restart CODESYS SP22 and update the project to use this new visualization profile (you can update this through the menu Project - Project Environment - Visualization Profile).
Last updated: 2026-08-05

Post by r-niedermayer on OPC UA subscriber not operational ^{CODESYS Forge talk (Post)}
Hi. As far as projects in "old version"s are concerned, these can be upgraded to newer versions at any time. To do this, the device must be updated accordingly and the copilers and library versions must be adapted. You can find instructions on how to proceed in the online help/FAQ: https://content.helpme-codesys.com/en/CODESYS%20Development%20System/_cds_changing_compiler_version.html https://content.helpme-codesys.com/en/CODESYS%20Development%20System/_cds_cmd_update_device.html See also 4.3.22.4 "How to open an Example Project" within the following pdf for more details on the single steps: https://forge.codesys.com/lib/counit/tickets/_discuss/thread/3e991befbc/ca97/attachment/Public%20FAQ-v13-20240610_075228.pdf Regaring your OPCUA connection state always showing just "DISABLED", without knowing both sides of the assembly in detail, one can only approach the problem theoretically. We can give a chekclist on how to proceed: Fist, please recheck the communication settings in the OPC UA connection function block to ensure that the server URL, endpoint URL, and other settings are correct and match the configuration of the OPC UA server. Verify that the OPC UA server is running and accessible. -You can try to connect to the OPC UA server using a separate client, such as UAExpert, to ensure that the issue is not related to the OPC UA server itself. Test the security settings in the OPC UA connection function block to ensure that the correct security policy and certificate are selected. If you are using a dynamic connection to the OPC UA server, probe that the connection settings are correctly configured and that the OPC UA client is able to establish a connection to the OPC UA server. Also, please loock into the log files for any errors related to the OPC UA connection function block, these should be listet there. The log files may also provide additional information about the issue and help you to further troubleshoot the problem. FYI - Please see https://content.helpme-codesys.com/en/CODESYS%20Communication/_cds_obj_data_source_communication_opc_ua_server.html: Her you can finde the Communication settings via OPC UA Server -> layout Browse Live Server: The client connects to the server and detects the existing variables and types. From Information Model The client reads the data structure (layout) of the OPC UA Server from the information model set here and as a result receives the information about available variables and types. A connection to the server is not required. The list contains the information models installed in the OPC UA Information Model Repository. "Read Connection" Settings from IEC Variable (option set): - The connection settings used by the device are not read here from the dialog, but at runtime from the IEC variable specified here. - For this possibility, please see the Using a Dynamic Connection to an OPC UA Server (https://content.helpme-codesys.com/en/CODESYS%20Communication/_comm_use_dynamic_opc_ua_server_comm_settings.html) The settings for the communication of a Client-data source to an OPC UA Server can also be dynamically configured from the IEC code and can also be changed at runtime. For such a purpose, a structure is available in the DatasourceOpcUAServer library (For a description of the OPC UA Server, there is one included in the standard installation of CODESYS, https://content.helpme-codesys.com/en/CODESYS%20Communication/_cds_encrypt_communication_data_sources_opc_ua_client.html)
Last updated: 2024-11-04

Post by sigurdrb on send appliaction files to wago plc (codesys 3.5) via ssh ^{CODESYS Forge talk (Post)}
Hi, I was hoping I could send the two files "application.app" and "application.crc" directly to the directory "/home/codesys/PlcLogic/Application" instead of logging into the device with codesys, downloading the program to the controller and then do the "create boot application", so it will reboot with the correct program running. I think i also need to edit the file "eRUNTIME.cfg" located in the "/home/codesys/ folder, because when I create the boot application from the codesys IDE, these lines are added to the file: [CmpApp] Application.1 = Application [SysFileMap] /home/codesys/PlcLogic/Application/Application.app=0x212520, 0x2DBC747E, 2DBC747E.app I think the "eRUNTIME.cfg" file is the same as CODESYSControl.cfg I also dont know the purpose of the hexadecimal numbers etc. that is generated. When I tried to replicate what codesys was doing, I placed the same files in the same folder as when codesys generated the boot file. And also added the lines in the eRUNTIME.cfg file: [CmpApp] Application.1 = Application [SysFileMap] /home/codesys/PlcLogic/Application/Application.app The controller did not boot up with any program, so my method did not work at all. I guess these lines tells the controller to run an application and where to find it? Could any of you help me with the best way to get the compiled program to the controller without using codesys or wago-software?
Last updated: 2024-05-28

Post by paulg on RasPi CAA Serial example - unexpected behavior during debug ^{CODESYS Forge talk (Post)}
I've trimmed down the CAA Serial Codesys example to only listen on one port but, when stepping through the Case structure in debug mode, it jumps out of the structure during a specific point in every scan (I'll point it out below after describing the setup and listing the code). I'm using a Pi 4 Model B, and I have an Arduino Nano Every plugged in via USB which is streaming the following serial message at 1 Hz: Time since opening connection: 1 s Time since opening connection: 2 s ...and so on. The Pi shows the Nano at /dev/ttyACM0 so I edited CODESYSControl_User.cfg to read: Linux.Devicefile=/dev/ttyACM The code in my PLC_PRG is (ignore some of the comments, I hadn't deleted them out from the original example): PROGRAM PLC_PRG VAR xStartTest : BOOL:= TRUE; iState : INT; xTestDone : BOOL;(* True, when the test was done succesfully *) (* Settings to communicate with the COM Port *) aCom1Params : ARRAY [1..7] OF COM.PARAMETER; como1 : COM.Open; comc1 : COM.Close; comw1 : COM.Write; comr1 : COM.Read; //sWrite : STRING := 'Test String!'; sRead : STRING(25); szRead : CAA.SIZE; xCom1OpenError : BOOL; xCom1CloseError : BOOL; xCom1WriteError : BOOL; xCom1ReadError : BOOL; END_VAR //This example shows the communication of two COM Ports with each other. //The first one writes a string of characters, which is read by the second one. //After successful execution, the two COM Ports are closed and the test is done. IF xStartTest THEN CASE iState OF 0: //The parameters are set for the COM Port aCom1Params[1].udiParameterId := COM.CAA_Parameter_Constants.udiPort; aCom1Params[1].udiValue := 1; // the correct Port should be adapted aCom1Params[2].udiParameterId := COM.CAA_Parameter_Constants.udiBaudrate; aCom1Params[2].udiValue := 115200; aCom1Params[3].udiParameterId := COM.CAA_Parameter_Constants.udiParity; aCom1Params[3].udiValue := INT_TO_UDINT(COM.PARITY.NONE); aCom1Params[4].udiParameterId := COM.CAA_Parameter_Constants.udiStopBits; aCom1Params[4].udiValue := INT_TO_UDINT(COM.STOPBIT.ONESTOPBIT); aCom1Params[5].udiParameterId := COM.CAA_Parameter_Constants.udiTimeout; aCom1Params[5].udiValue := 0; aCom1Params[6].udiParameterId := COM.CAA_Parameter_Constants.udiByteSize; aCom1Params[6].udiValue := 8; aCom1Params[7].udiParameterId := COM.CAA_Parameter_Constants.udiBinary; aCom1Params[7].udiValue := 0; //The first Port is opened with the given parameters como1(xExecute := TRUE, usiListLength:=SIZEOF(aCom1Params)/SIZEOF(COM.PARAMETER),pParameterList:= ADR(aCom1Params)); IF como1.xError THEN xCom1OpenError := TRUE; iState := 1000; END_IF //After a successful opening, the next state is reached IF como1.xDone THEN iState := 15; END_IF 15: // the reading process is started comr1(xExecute := TRUE,hCom:= como1.hCom, pBuffer:= ADR(sRead), szBuffer:= SIZEOF(sRead)); IF comr1.xError THEN xCom1ReadError := TRUE; END_IF //After completion the size of the written bytes are saved IF comr1.xDone OR comr1.xError THEN szRead := comr1.szSize; iState := 20; END_IF 20: // If everything was successful the ports are closed and the handles are released comc1(xExecute := TRUE,hCom:= como1.hCom); IF comc1.xError THEN xCom1CloseError := TRUE; END_IF IF comc1.xDone OR comc1.xError THEN iState := 25; END_IF 25: // The first port is closed and the used handle released xTestDone := TRUE; xStartTest := FALSE; iState := 0; como1(xExecute := FALSE); comw1(xExecute := FALSE); comc1(xExecute := FALSE); ELSE iState := 0; END_CASE END_IF I realize as I write this that the .udiPort should be 0 and not 1, but that shouldn't be causing the issue I'm seeing. I'm forcing xStartTest:=TRUE every scan so that I can step into each line and observe what's happening. What I see is that the port parameters are set and the port is opened with no errors, but the code jumps out of the case structure to the last line every time it reaches (and I step into) the iState:=15 line (at the end of the iState:=0 block). So every scan cycle it goes through the block for iState=0 and jumps out at the same spot. I'm a little new to PLC programming so I may be misunderstanding the flow, but shouldn't this case structure keep moving down in the same scan? If it only handles one case per scan, why doesn't the value of iState persist? Thanks! Update: I restarted the Codesys control today and I was then able to see an error for como1.eError of "WRONG_PARAMETER". I tried doing some digging and another post made me think I should add another line to CODESYSControl_User.cfg, so I now have: [SysCom] Linux.Devicefile=/dev/ttyACM portnum := COM.SysCom.SYS_COMPORT1 So now when I set .udiPort to 1, I get "NO_ERROR" but I also don't read anything from the port (i.e. szRead = 0 always). If I try setting the port to 0 (which I'm confused about, because I added a COMPORT1 line but the device shows on the Pi as ACM0), I get the "WRONG_PARAMETER" error again. Is there an easier way to troubleshoot the Pi and view what ports the Codesys runtime is actually able to see while the Pi is running?
Last updated: 2024-06-06

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