Recovering from a Lost Password

If you forget the password, you must clear the memory of the S7-200 and reload your program.

Clearing the memory puts the S7-200 in STOP mode and resets the S7-200 to the factory-set

defaults, except for the network address, baud rate, and the time-of-day clock. To clear your

program in the S7-200:

1. Select the

PLC > Clear menu command to display the Clear dialog box.

2. Select all three blocks and confirm your action by clicking OK.

3. If a password had been configured, STEP 7--Micro/WIN displays a password-authorization

dialog box. To clear the password, enter CLEARPLC in the password-authorization dialog

box to continue the Clear All operation. (The CLEARPLC password is not case sensitive.)

The Clear All operation does not remove the program from a memory cartridge. Since the memory

cartridge stores the password along with the program, you must also reprogram the memory

cartridge to remove the lost password.