Downloading from the manufacturer ensures you get the necessary hardware libraries out of the box. System Requirements and OS Compatibility
32-bit application (runs in Program Files (x86) on 64-bit OS) Important Windows 10 and Windows 11 Workarounds codesys 2.3.9 download
If your PLC isn't in the list when starting a new project, you haven't installed the vendor-specific target files. Downloading from the manufacturer ensures you get the
If your project uses custom or manufacturer-specific .lib files, keep them in a dedicated folder inside your project directory rather than relying on the global CoDeSys library directory. codesys 2.3.9 download
If you can't "Login" to your PLC, check your Gateway settings. Most 2.3.9 connections use TCP/IP or Serial (RS232).