Rules For The Replacement Parts Scenario - Siemens SIMATIC ET 200AL System Manual

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Communications services

3.6 Secure Communication

Rules for the replacement parts scenario

The assignment of passwords to protect confidential PLC configuration data also has an

impact on the replacement parts scenario.

Rules for the replacement parts scenario

Observe the following rules for the replacement parts scenario:

Configuration of the replacement CPU via TIA Portal

• A CPU as replacement for an existing CPU should not have a configuration or a configured

password to protect confidential PLC configuration data.

Advantage: You can load the project into the replacement CPU without any further

preparation - regardless of whether a password is configured or not.

• If the replacement CPU has already been configured, you must reset the CPU to the factory

settings with the following options set:

– "Delete password for protection of confidential PLC configuration data"

– "Format memory card"

Replacement CPU is supplied with configuration data via memory card

• If you have not assigned a password to a CPU in your project to protect confidential PLC

configuration data, you can insert the memory card of the CPU to be replaced into a

brand-new, unused CPU without any further action needed.

If the replacement CPU has already been configured with a password to protect

confidential PLC configuration data, you must first reset this CPU to the factory settings

using the option "Delete password for protection of confidential PLC configuration data".

• If you have assigned the same password to a group of CPUs, you can also assign the group

password to the replacement CPU via the TIA Portal or via an appropriately prepared

memory card (see Protection of confidential configuration data (Page 61)).

In this case you can, for example, insert a memory card with the current project into the

CPU and put it into operation without any further password handling.

• If you assign different passwords to each CPU in your project, you must first set the

password valid for the respective CPU with the online and diagnostics editor when using

the replacement CPU (area "Set password for protection of confidential PLC configuration

data", see Changing your password (Page 65)).

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