: Format a MicroSD card and create a text file named S7_JOB.S7S . Inside the file, type only the text factory reset . Execution : Power off the PLC. Insert the MicroSD card into the slot. Power the PLC back on and wait roughly 10 seconds .
Siemens uses four distinct protection levels for the S7-200 SMART. Knowing which one is active helps determine your options: : No password; full access. s7 200 smart plc password unlock new
: Complete lockout. You cannot upload the program from the PLC even with a password. In this case, you must have the original project file on your PC to make changes. 4. Bypassing Block-Level Protection : Format a MicroSD card and create a text file named S7_JOB
: 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 . Insert the MicroSD card into the slot
For newer S7-200 SMART models, you can perform a factory reset without software using a standard MicroSD card.