Siemens SIMATIC ET 200AL, System Manual

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Communications services
3.6 Secure Communication
Communication
Function Manual, 05/2021, A5E03735815-AJ
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3.6.2.4 Resetting the password
The protection of the confidential PLC configuration data can be reset. This may be necessary,
for example, if you want to change the password but no longer know the current password.
Password lost - configuration not yet loaded
Since you have to enter the password when loading the CPU via TIA Portal for the first time,
the CPU configuration for this CPU can no longer be used. To change the password in the CPU
properties, you must also enter the previously valid password. If you forget your password,
do the following:
Requirement
• The CPU is not yet loaded
Procedure
1. Open the CPU properties in the network view or in the device view.
2. Navigate to the area "Protection & Security > Protection of the PLC configuration data".
3. Click "Reset".
Please note that the certificates of the CPU (e.g. certificates for web server, for OPC UA
server, for PG/PC communication and HMI communication) may no longer be used after
the reset and may have to be created again and reassigned.
– If you use the global security settings for the certificate manager, you must reassign
the certificates from the certificate manager.
– If you do not use the global security settings for the certificate manager, you must
recreate and reassign the certificates.
4. Confirm the reset of the password.
The option for the protection of confidential PLC configuration data is still activated.
Delete password – Configuration is already loaded
If the CPU has already been loaded with a configuration and the configuration is protected
with a password for confidential PLC configuration data, you can, for loading a new project,
delete the password for confidential PLC configuration data online and then specify a new
password.
Requirements
• You have write access to the CPU
• The CPU must be in STOP mode.
Procedure
1. Select the CPU in the network view.
2. Select the "Online & Diagnostics" command from the shortcut menu.