Protection
8.4 Protecting blocks
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Operating Instructions, 05/2019, A5E46864285-AA
83
8.4 Protecting blocks
You can use know-how protection to protect one or more blocks of the OB, FB, FC type and
global data blocks from unauthorized access with a password (Page 84).
This protects the code of the block from unauthorized reading and modification.
Note
Transferring protected block or library
If you transfer a protected block from a hardware controller to a project of a SIMATIC S7
-
1500 Software Controller or vice versa, the block must be compiled
again. To do so, you
ed the password for the block that is to be compiled.
If you transfer a system library from a hardware controller to a project of a SIMATIC S7
-
1500
Software Controller, the library must be recompiled.
Possible actions
The following actions can be performed with a know-how-protected block:
● Copying and deleting
● Calling in a program
● Online/offline comparison
● Downloading
Readable data
If a block is know-how protected, only the following data is readable without the correct
password:
● In/out parameters Input, Output, InOut, Return, Static, Temp
● Block title
● Block comment
● Block properties
● Global tags without information on the point of use
Reference
For additional information on protected blocks or copying protected blocks and libraries,
please refer to the STEP 7 Online Help.
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