S71200 Password Unlock Work May 2026

Turn the power back on. The MAINT LED will flash, indicating the CPU is copying the empty configuration to its internal memory.

If the PLC protection level allows you to go "Online" (e.g., it is only set to rather than Full Protection ), you can reset it via software. S7-1200 Reset Password Without MMC Using Firmware Update s71200 password unlock work

If you do not have the original password and simply need to use the PLC for a new task, you must perform a factory reset. This is the only official way to bypass a lost password, but it the existing user program and hardware configuration. Turn the power back on

The PLC is now at factory defaults with no password protection, allowing you to download a new project. 2. TIA Portal Factory Reset (Online Method) S7-1200 Reset Password Without MMC Using Firmware Update

Insert the empty SIMATIC card into the PLC's slot.