: In the STEP 7-Micro/WIN SMART software, if you are prompted for a password when trying to clear the PLC, use the universal reset string: CLEARPLC . Procedure : Connect your PC to the PLC via Ethernet. Open STEP 7-Micro/WIN SMART . Navigate to the PLC menu and select Clear .
If you have a legitimate Siemens contract and can prove ownership of the machine, Siemens can sometimes help—though not directly.
Connect a logic analyzer or CH341A programmer to the 8-pin SOIC EEPROM (usually 24C256 or 24C512) on the S7-200 SMART PCB. Dump the binary (256 bytes). The password hash (not plaintext) is stored at offset 0x1E0–0x1F0 . New tools (e.g., S7Smart HashCat module ) precompute rainbow tables for Siemens’ custom MD5-based hash.
how can i clear password? what is main work of wipeout software? (i have back up of the plc program on my loptop). best regards. . S7 200 Smart PLC Reset to factory default
: Use the STEP 7-Micro/WIN SMART software to perform a memory reset. Navigate to the menu and select Select all blocks (Program, Data, and System) to be wiped.