Running MEDOC effectively requires understanding its original hardware specifications. The software was designed to run on the following operating systems, with the hardware requirements listed in the table below:
Requires very little disk space and memory compared to modern IDEs. Why Search for a MELSEC MEDOC 2.4 Download Today?
Here is the critical reality check: It is an obsolete, unsupported, and end-of-life product. You will not find an official, clean download on Mitsubishi’s global or regional websites.
It provides a raw look at how PLC logic was structured before the "bloat" of modern graphical interfaces. Compatibility and Installation Challenges
The software’s main purpose is to create, edit, monitor, and transfer ladder logic programs to and from a PLC. Ladder logic is the primary graphical programming language for PLCs, representing control circuits in a schematic format. A German forum user described the situation when encountering a Mitsubishi A3UCPU and needing to access the program stored in its battery-backed RAM. They mentioned that they "read that a DOS-based software called MEDOC in version 2.4 and an update to 2.41 was once available for download somewhere in Taiwan... but probably no longer exists". This user's problem—needing to maintain a legacy system with obscure software—is the core issue that this article addresses.
If you are looking to pull a program off a specific PLC model, tell me the (e.g., FX-24MR, A1S) so I can verify the correct cable pinout and software compatibility for your project. Share public link
MEDOC projects usually consist of a folder containing multiple files (e.g., .NAM , .HDR , .PRG ). Ensure you keep the entire folder structure intact when moving files.
Running 16-bit DOS software on modern 64-bit Windows requires emulation or specific configurations: