If the IDE closes unexpectedly on modern operating systems, right-click the CODESYS desktop shortcut, go to , check the box for "Run this program in compatibility mode for," and select Windows 7 .
CoDeSys (Controller Development System) is a leading hardware-independent IEC 61131-3 development tool used to program programmable logic controllers (PLCs) and automation components. Developed by the German company 3S-Smart Software Solutions (now CODESYS Group), version 2.3 remains a cornerstone in industrial automation. Even with the introduction of CoDeSys V3, version 2.3.9 is widely utilized worldwide to maintain legacy systems and program specific industrial controllers.
CODESYS is one of the most widely adopted IEC 61131‑3 programming systems in industrial automation. Developed by the German company CODESYS GmbH (formerly 3S‑Smart Software Solutions), it allows engineers to program Programmable Logic Controllers (PLCs) using a unified development environment. While the modern CODESYS V3 series is the current standard, the V2.3 branch—especially version —remains an important tool for maintaining legacy equipment, upgrading older controllers, and working with hardware that never received V3 support. This article provides a comprehensive guide to downloading, installing, and working with CODESYS 2.3.9 . codesys 2.3.9 download
Right-click the Setup.exe file and select .
Perfect for step-by-step sequential processes and state machines. If the IDE closes unexpectedly on modern operating
When you open CODESYS V2.3 and create a new project (Standard Project), it prompts you to select a . The "Target" is the configuration bridge between the IDE and the specific PLC hardware (CPU type, memory layout, I/O addressing). If no target files are installed, the list will be empty. Generally, users rely on Target files provided by the PLC manufacturer ; some third-party providers have also historically packaged V2.3 with pre-configured targets to simplify use.
Go to Online > Communication Parameters to configure your connection. For older hardware, you will likely need to configure a serial (RS-232) or a basic TCP/IP driver via the CODESYS Gateway. PleaseIf you want, tell me: The you are trying to connect to Even with the introduction of CoDeSys V3, version 2
Native support. The software runs flawlessly on these systems.
Here is everything you need to know before you hit "download."
Write code using Ladder Diagram (LD), Structured Text (ST), Function Block Diagram (FBD), Instruction List (IL), Continuous Function Chart (CFC), or Sequential Function Chart (SFC).