S7-200 Password Unlock: Siemens

On some models, you can reset the CPU using the physical mode selector switch: Switch off the power and remove any memory cartridges. Hold the switch in the position while powering on.

The most common restriction. Users cannot upload or download code. The PLC requires the password for any modifications or code viewing. Siemens S7-200 Password Unlock

When prompted for a password, type CLEARPLC in all capital letters. Confirm the action. On some models, you can reset the CPU

The S7-200 implements a four-level protection system within its System Block Access Type Restrictions Full Access No password; unrestricted reading and writing. On some models