The official and most secure way to download CODESYS V2.3.9 (specifically version 2.3.9.35 and related patches) is through the CODESYS Store or authorized hardware manufacturer portals. Because CODESYS V2.3 is a legacy system, it is often distributed by hardware partners alongside their specific "Target" files. Official Download Sources

Legacy Hardware: This version is primarily used for older PLCs that do not support the newer CODESYS V3.5 (SoMachine, e!Cockpit, etc.).

: Since V2.3 is often hardware-specific, it is best retrieved from vendor sites: CODESYS Version 2.3.9.35 for their programmable gateways. : Provides a dedicated CODESYS 2.3 software package for ecomatmobile controllers. WAGO/Other Vendors

System Requirements

What is CODESYS 2.3.9?

| Manufacturer | Model Example | Download Section Name | |--------------|---------------|------------------------| | Wago | 750-841, 750-881 | “WAGO-I/O-PRO CAA” (based on CODESYS 2.3.9) | | Beckhoff | CX1020, BX9000 | “TwinCAT 2 PLC Control” (identical to CODESYS 2.3.9) | | Festo | FEC, CECX | “Festo Soft PLC – CODESYS V2.3” | | Eaton | XC-CPU201 | “Eaton CODESYS 2.3 Runtime” | | Turck | BL20, BL67 | “Turck CODESYS 2.3 Programmer” |