Siemens SIMATIC ET 200AL, System Manual

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Communications services
3.6 Secure Communication
Communication
Function Manual, 05/2021, A5E03735815-AJ
65
3.6.2.3 Changing your password
It makes a difference whether the CPU has already been loaded or not. If the CPU has already
been loaded, it has the key information with which the password-protected PLC configuration
data can be used.
Change password - configuration not yet loaded
As long as you have not yet loaded a configuration into the CPU, you can change an entered
password or you can revoke the activation of the password protection.
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 the "Change" button or deactivate the option "Protect confidential PLC configuration
data".
4. Enter the previously valid password in the dialog. In case of a password change, also enter
the new password and confirm the new password.
As long as you have not yet loaded a configuration into the CPU, the CPU is in a provisioning
phase (see CPU behavior from loading to operational readiness (Page 96)) and you can load
any valid configuration with your configured password.
Change 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 must first either reset the CPU to
the factory settings and delete the password for confidential PLC configuration data in the
CPU or delete it directly online and then set it.
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.