Intermediate Success Rate: Low (only on old firmware V2.x and early V3.x) Risk: Low (no physical damage)
Power off the PLC. Insert the transfer card and power the PLC back on. LED Indicators: Watch the LEDs. The s71200 password unlock top
This is the standard way to clear a password-protected PLC. You must use an (at least 2MB). Intermediate Success Rate: Low (only on old firmware V2
To understand why "unlocking" an S7-1200 is so complex, you have to understand what the password actually protects. s71200 password unlock top
There are several scenarios where password unlocking becomes essential: