Ethernet firewall, incorrect subnet, or the tool does not support your firmware. Solution: Use a direct crossover cable, disable Windows firewall, test with STEP 7‑Micro/WIN SMART ping function first.
: The PLC is now "blank" and has no password. You can now download a new program to it. 2. Resetting via Micro SD Card (Hard Reset) siemens s7 200 smart password unlock