Information About Compatibility - Siemens SIMATIC ET 200AL System Manual

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Communications services

3.6 Secure Communication

Behavior with enabled option "Use only Legacy PG/PC communication"

• A password to protect confidential PLC configuration data cannot be specified, modified or

deleted online for CPUs. These functions require disabling the "Use only Legacy PG/PC

communication" option.

• A CPU that is set to only permit secure PG/PC and HMI communication can no longer be

reached online.

Information about compatibility

The following description provides information about the interaction between different TIA

Portal versions with different CPU firmware versions and the effects on the type of PG/HMI

Projects created with TIA Portal < V17

For example, if you have created a project with TIA Portal version V16 for an S7-1500 CPU

(e.g. version V2.8), then the corresponding configuration with TIA Portal V17 can also be

loaded into an S7-1500 CPU V2.9, e.g. in a spare part scenario - with the same behavior as a

configuration on an S7-1500 CPU V2.8.

Even projects created with TIA Portal < V17 and transferred to a memory card work without

problems in an S7-1500 CPU V2.9.

However, the concept of protecting confidential PLC configuration data applies as soon as

you open the project with TIA Portal ≥ V17, update the firmware version of the CPU via a

device replacement and thus save it as a CPU with a firmware version ≥ V2.9 (see Useful

information for the protection of confidential PLC configuration data (Page 63)). The project

can no longer be edited with previous versions of TIA Portal V17.

Function Manual, 05/2021, A5E03735815-AJ

Communication

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