S7-200 Unlock Tool [exclusive] -

A utility that deletes the user program, data blocks, and configuration information while resetting the baud rate to 9.6 kbit/s.

This is a physical device (Arduino-based or custom PCB) that you wire directly to the PLC’s programming port or the external EEPROM chip (usually a 24LCxx series). s7-200 unlock tool

Unlike modern PLCs with complex encryption, the S7-200 (especially the original CPU 21x and 22x series) uses a stored in the EEPROM of the PLC. It is not military-grade encryption, but it is robust enough to stop casual users. A utility that deletes the user program, data