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.
Below is a guide on how to work through an S7-1200 password lock using official and community-vetted methods. 1. The "Transfer Card" Method (Wipe & Reset) s71200 password unlock work
Turn the power back on. The MAINT LED will flash, indicating the CPU is copying the empty configuration to its internal memory. If you do not have the original password