If you cannot communicate with the PLC, you can create a reset card using a standard Micro SDHC card.
On your PC, create a text file named S7_JOB.S7S and write factory reset inside. siemens s7 200 smart password unlock work
The most secure level where a password is required for almost all operations, including uploading or downloading the program. Method 1: The "Factory Reset" (No Password Recovery) If you cannot communicate with the PLC, you
Insert the card into the PLC and power cycle it. This will reset the device to its default state and IP address. Method 2: Unlocking Project & Function Block Passwords Method 1: The "Factory Reset" (No Password Recovery)
S7 200 Smart - Forget password - Minimum Privilege - SiePortal
If your primary goal is to to download a new program (and you do not need the old code), you can perform a factory reset. This "unlocks" the hardware by erasing everything. Micro/WIN SMART "Clear" Command: Connect your PC to the PLC via Ethernet. Open STEP 7-Micro/WIN SMART . Navigate to the PLC menu and select Clear . Choose "Reset to factory defaults and forget password" .
Users can read, write, upload, and download programs without restriction.