These tools target specific legacy Omron series—most notably the families. Version 4.2 implies a specific build that many users claim supports the following:

The software sends repeated FINS command frames (Command Code 2201 or 2202) attempting different password combinations. V4.2 is reputed to have an optimized dictionary for Omron’s default passwords (e.g., SECURITY , OMRON , 00000000 ).

Here’s why:

Omron PLC Password Unlock Software V4.2 is a third-party software utility. It is designed to recover, bypass, or crack UM (User Memory) and Task passwords on legacy Omron PLC models. Supported Hardware and Protocols