If you have some level of access or the protection level allows for "Online & Diagnostics" without a password, you can reset it directly through the software.
. This process erases the internal load memory, including the current program and the password protection. Siemens SiePortal 1. Requirements SIMATIC Memory Card s71200 password unlock work
The original programmer had left the company three years ago, taking the password to the grave—or at least to a competitor across the state. Elias tried every variation of the company name, the project number, and even the classic "admin" or "LOGO". Nothing. The PLC was a digital fortress, its "Know-How Protection" doing exactly what it was designed to do: keeping everyone out. Reset to factory settings - remove password - SiePortal If you have some level of access or
Wait for the blinking to stop. the CPU and remove the card . Siemens SiePortal 1
: Within TIA Portal, navigate to Online & Diagnostics > Functions > Reset to factory settings .
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