Siemens Simatic S7-200 System Manual page 125

CPU Configure
Output Table
Port 0
Full Privileges (Level 1)
Partial Privileges (Level 2)
Minimum Privileges (Level 3)
Configuration parameters must be downloaded before they take effect.
Figure 6-10
What to Do If You Forget the Password
If you forget the password, you must clear the CPU memory and reload your program.
Clearing the CPU memory puts the CPU in STOP mode and resets the CPU to the
factory-set defaults, except for the node address and the time-of-day clock.
To clear your program in the CPU, select the CPU
Clear dialog box. Select the "All" option and confirm your action by clicking the "OK" button.
This displays a password-authorization dialog box. Entering the Clear password (clearplc)
allows you to continue the Clear All operation.
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.
Warning
!
Clearing the CPU memory causes the outputs to turn off (or in the case of an analog
output, to be frozen at a specific value).
If the S7-200 CPU module is connected to equipment when you clear the CPU memory,
changes in the state of the outputs can be transmitted to the equipment. If you had
configured the "safe state" for the outputs to be different from the factory settings, changes
in the outputs could cause unanticipated activity in the equipment, which could also cause
death or serious injury to personnel, and/or damage to equipment.
Always follow appropriate safety precautions and ensure that your process is in a safe
state before clearing the CPU memory.
S7-200 Programmable Controller System Manual
C79000-G7076-C230-02
Basic Concepts for Programming an S7-200 CPU
Port 1 Input Filters
Retentive Ranges Password
Password:
Verify:
Configuring a Password for the CPU
OK Cancel
Clear... menu command to display the
6-15