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Insert the empty SMC into the CPU slot located behind the lower front flap. Switch the main power supply back ON.
There are several scenarios where password unlocking becomes essential: s71200 password unlock top
Elias typed it in. The red "Locked" icon turned green. The "top" level access was granted. With a few clicks, he bypassed the faulty sensor logic, and the factory floor roared back to life. The amber light on the S7-1200 turned a steady, peaceful green. Insert the empty SMC into the CPU slot
The best way to unlock an S7-1200 is to never get locked out in the first place. he bypassed the faulty sensor logic