Post by scrisp on Source code changes since last download ^{CODESYS Forge talk (Post)}
Why does CODESYS 3.5 show the message “Source code changes since last download” even though I did not create or modify any new variables? When I go online with the PLC, it detects changes and suggests synchronizing, but nothing was actually changed in the project. What could cause this and how can I fix it?
Last updated: 2025-11-28

Post by jrsantab on Remote connection to ifm PLC & HMI ^{CODESYS Forge talk (Post)}
We have finally solved the problem. The version of the Gateway in the computer that worked (3.5.11.0) and the one that didn't (3.5.17.30) was different. We have three different Codesys 3.5 versions installed because we work with different controllers. I believe that, depending on the sequence you follow to install the versions you get a different Gateway version. To solve the problem you first have to disable the "obsolete" services. Open services, serach for (in our case) CODESYS Gateway V3 Version 3.5.11.0 CODESYS ServiceControl Version 3.5.11.0 I stopped the services and changed to Manual Start. Then you have to create the new services. In our case, from a Command Prompt session (cmd): SC CREATE "Codesys GatewayService Rigual" binpath="C:\Program Files\CODESYS 3.5.17.30\GatewayPLC\GatewayService.exe" and then SC CREATE "CODESYS ServiceControl Version 3.5.17.30" binpath="C:\Program Files\CODESYS 3.5.17.30\GatewayPLC\CODESYSControlService.exe" remember also to set them as Automatic Start!
Last updated: 2024-04-22

Post by mondinmr on Frustration-Fueled Feedback on Project File Management and Git Integration ^{CODESYS Forge talk (Post)}
In reality, other vendors are already moving towards integration with VS Code. B&R, for example, is likely the only one that could truly challenge Codesys in the market: they’ve overhauled their once-archaic environment (previously lacking ST OOP) and are now catching up significantly with Automation Studio Code, offering modern programming capabilities and native support for tools like Git and GitHub Copilot. The other big names in the market, frankly, are still light years behind. For smaller projects, typically handled by “wire strippers” (with all due respect!), a classic environment might be just fine. But once you’re dealing with thousands or even millions of lines of code—possibly organized in an OOP paradigm, spanning large teams, integrating third-party libraries, requiring version control, and performing comprehensive tests—a lightweight, responsive editor supercharged with AI-based features becomes essential. The real strength of something like VS Code lies in its vast ecosystem of extensions and integrations: from advanced Git support to automated build/test pipelines, and even AI-assisted autocompletion that already makes software development much more agile and productive. I understand that a PLC project involves more than just ST code (task setup, fieldbus configuration, libraries, etc.). However, there’s no technical reason not to at least provide ST files in a pure text format, making version control and collaboration far easier. B&R has clearly adopted this approach; I hope Codesys will accelerate its own efforts to offer a native, text-based integration and modern development tooling. Once you go beyond a certain level of complexity—dozens of configurations, OOP hierarchies, and distributed teams—you really do need “engineer-level” software tools, not just solutions targeting “wire strippers.” For large-scale automation projects, a more open and flexible approach is the only way to avoid chronic frustration. Let me emphasize that I truly love Codesys and consider the work done so far to be brilliant—I’d be sorry to see it overshadowed by others moving faster in this direction.
Last updated: 2025-02-18

Compiling CoDeSys project using the command line interface ^{CODESYS Forge talk (Thread)}
Compiling CoDeSys project using the command line interface
Last updated: 2021-01-27

Using ScriptEngine in C# for Creating Codesys Project ^{CODESYS Forge talk (Thread)}
Using ScriptEngine in C# for Creating Codesys Project
Last updated: 2019-06-24

The intent of two Library Managers in a Project ^{CODESYS Forge talk (Thread)}
The intent of two Library Managers in a Project
Last updated: 2016-08-22

Master&Slave Program in 4 Axis CNC Project ^{CODESYS Forge talk (Thread)}
Master&Slave Program in 4 Axis CNC Project
Last updated: 2023-10-01

Access project information of references library by script ^{CODESYS Forge talk (Thread)}
Access project information of references library by script
Last updated: 2023-10-23

Scripted Git clone / checkout being blocked by "Project Environment" popup ^{CODESYS Forge talk (Thread)}
Scripted Git clone / checkout being blocked by "Project Environment" popup
Last updated: 2023-12-05

Download EtherCAT project on SoftPLC (ControlWin-V3 x64) ^{CODESYS Forge talk (Thread)}
Download EtherCAT project on SoftPLC (ControlWin-V3 x64)
Last updated: 2024-08-08

Ethercat project loaded to Win V3 x64 bit SoftPLC ^{CODESYS Forge talk (Thread)}
Ethercat project loaded to Win V3 x64 bit SoftPLC
Last updated: 2024-08-22

Unable to add alarm configuration object to project ^{CODESYS Forge talk (Thread)}
Unable to add alarm configuration object to project
Last updated: 2024-09-27

Script python for write in a file Project information ^{CODESYS Forge talk (Thread)}
Script python for write in a file Project information
Last updated: 2025-04-28

I have errors while building the project ^{CODESYS Forge talk (Thread)}
I have errors while building the project
Last updated: 2025-06-25

Script python for write in a file Project information ^{CODESYS Forge talk (Thread)}
Script python for write in a file Project information
Last updated: 2025-07-13

projects.open not working for file based storage project ^{CODESYS Forge talk (Thread)}
projects.open not working for file based storage project
Last updated: 2025-09-05

PHOENIX CONTACT Axioline PLCnext project in CodeSys SodftPLC ^{CODESYS Forge talk (Thread)}
PHOENIX CONTACT Axioline PLCnext project in CodeSys SodftPLC
Last updated: 2025-09-10

502 error when opening new empty unipi project ^{CODESYS Forge talk (Thread)}
502 error when opening new empty unipi project
Last updated: 2017-02-20

Retrieving project settings and device information programmatically ^{CODESYS Forge talk (Thread)}
Retrieving project settings and device information programmatically
Last updated: 2016-07-04

Cannot access primary project with --noUI option ^{CODESYS Forge talk (Thread)}
Cannot access primary project with --noUI option
Last updated: 2016-12-14

Profinet I/O connection without GSD and project updating ^{CODESYS Forge talk (Thread)}
Profinet I/O connection without GSD and project updating
Last updated: 2020-09-24

How can I import my GSDML File into project? ^{CODESYS Forge talk (Thread)}
How can I import my GSDML File into project?
Last updated: 2023-01-27

Manage Codesys Git project, inside of a parent git repository ^{CODESYS Forge talk (Thread)}
Manage Codesys Git project, inside of a parent git repository
Last updated: 2022-04-22

Save projects as Encrypted CoDeSys project ^{CODESYS Forge talk (Thread)}
Save projects as Encrypted CoDeSys project
Last updated: 2009-09-16

Problem building simple EtherNet/IP project - library problem? ^{CODESYS Forge talk (Thread)}
Problem building simple EtherNet/IP project - library problem?
Last updated: 2022-10-27

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