If you are currently searching for this software because a machine is down, contact an Emerson legacy support partner immediately. If you are simply archiving, consider uploading the clean, original ZIP to the Internet Archive with proper metadata—but check copyright laws first.
[autoexec] # Mount the LM90 folder as drive C: mount C C:\Legacy\LM90 C: # Set environment for LM90 SET LM90=C:\LM90 # Launch LM90 (optional: manual start) # LM90.EXE logic master lm90 software download zip 2021
Instead, search for or contact a local Mitsubishi Electric automation distributor. If you are currently searching for this software
Last updated: October 2025. Information regarding software availability is subject to change. Last updated: October 2025
Some vintage industrial control forums (like PLCtalk.net or MrPLC.com) have archived legal copies under “abandonware” discussion – but and only for educational/preservation purposes. Neither I nor any responsible platform encourages piracy.
Logicmaster 90 (LM90) is an obsolete, DOS-based software package originally developed by GE Fanuc to program and communicate with , 90-20 , and 90-70 PLCs . While it was a standard tool in the 1990s, it is no longer supported by GE Automation (now part of Emerson). Current Status and Downloads