If you are looking for the specific, archaic "NT Support Tool" (older versions that run on Windows 95/98), they are considered obsolete and are not officially hosted by Omron anymore. In this scenario, you must rely on the modern CX-Designer to open older project files.
: Easily link HMI buttons and displays to PLC addresses (CS/CJ/CP series). omron nt series support tool download
Historically, Omron provided a specific piece of software simply called the . This was the dedicated environment for creating screens for NT20, NT30, and NT31 terminals. If you are looking for the specific, archaic