To avoid password-related issues in the future:
: A standalone Siemens executable (often found on the installation CD) that resets the CPU to factory defaults, including resetting the IP address and communication baud rate. siemens s7 200 smart password unlock work
Unlocking the PLC while keeping the internal program (cracking) is significantly more difficult and falls into a "gray area." To avoid password-related issues in the future: :
(e.g., STEP 7-Micro/WIN SMART V2.5 or V2.8). siemens s7 200 smart password unlock work
These levels generally restrict access to varying degrees (read-only, write-protect).