Know-How Protection - Siemens SIMATIC S7-1500 System Manual

Automation system
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Protection

15.5 Know-how protection

15.5
Know-how protection
You can use know-how protection to protect one or more blocks of the OB, FB, FC type and
global data blocks in your program from unauthorized access. You can enter a password in
order to restrict access to a block. The password offers high-level protection against
unauthorized reading or manipulation of the block.
If a block is know-how protected, only the following data is readable without the correct
password:
● Block title, comments and block properties
● Block parameters (INPUT, OUTPUT, IN, OUT, RETURN)
● Call structure of the program
● Global tags without information on the point of use
Further actions that can be carried out with a know-how protected block:
● Copying and deleting
● Calling in a program
● Online/offline comparison
● Load
Global data blocks and array data blocks
You cannot provide global data blocks (global DBs) with know-how protection. Users who do
not possess the valid password can read the global data block but not change it.
You cannot provide array data blocks (array DBs) with know-how protection.
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S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB

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