The tool itself evolved. Jun built a GUI to let technicians drag-and-drop images, select target harness profiles, and preview translations. He added templated mapping profiles for common FANUC PMC revisions and an automated sanity checker that flagged impossible mappings (like mapping an analog input to a discrete relay). He also implemented a simulation mode where the translated logic could be emulated against a virtual I/O set to observe behavior without touching hardware.
Fanuc PMC EPROM Convert Tool (and its modern equivalent, the FANUC LADDER-III Fanuc Pmc Eprom Convert Tool
: High-quality CMOS EPROMs (e.g., STMicroelectronics 27C series) matching the access speeds (nanoseconds) required by the Fanuc motherboard. The tool itself evolved
: The tool generally supports legacy Fanuc controllers, including: Fanuc 0 series (0A, 0B, 0C, 0D, 0E, 0F). Fanuc 3, 6, 9, 10, 11, and 12. Fanuc 15, 16, 18, 20, and 21. He also implemented a simulation mode where the
That realization sparked an idea: Jun would build a conversion workflow to safely translate EPROM images between machine variants — an EPROM Convert Tool that preserved function while adapting I/O maps and version metadata. It had to be conservative, auditable, and reversible.
Many older machines have lost their hard-copy schematics. A conversion tool allows you to reconstruct the ladder logic from the machine itself. Supported Fanuc Systems and EPROMs