He did. No changes in six years. But the checksum of the program in the PLC’s EPROM didn’t match the backup on our server. Not by a byte—by a single bit.
And in the Syswin status bar, at the very bottom, a line of red text appeared for three seconds: Syswin 64 Bit Omron
“Marcus,” I whispered. “Pull the revision history.” He did
That’s when I saw it.