Default state. Anyone can read and modify both hardware and software configurations.
The act of unlocking a PLC is fraught with legal implications. While a maintenance engineer might argue they are recovering their company's asset, the methods used—particularly reverse-engineering the firmware—often violate the software license agreements of the manufacturer. Furthermore, providing unlocking services occupies a grey area in intellectual property law. S7-1200 Password Unlock
: Turn off the S7-1200, insert the blank transfer card, and turn the power back on. Default state