When a protected block is opened, STEP7 connects to the password provider and retrieves
the corresponding password.
You need to install and activate a password provider before you can connect it. A settings file
in which you define the use of a password provider is also required.
A password provider offers the following advantages:
•
The password provider defines and manages the passwords. When know-how protected
blocks are opened, you work with symbolic names for passwords. For example, a
password is marked with the symbolic name "Machine_1" in the password provider. The
actual password behind "Machine1" is not disclosed to you.
A password provider therefore offers optimum block protection as the users do not know
the password themselves.
•
STEP7 automatically opens know-how protected blocks without the direct entry of a
password. This saves you time.
You can find more information on connecting a password provider in the STEP7 online help.
Readable data
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
Further actions that can be carried out with a know-how protected block:
•
Copying and deleting
•
Calling in a program
•
Online/offline comparison
•
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Global data blocks and array data blocks
You protect global data blocks (global DBs) from unauthorized write access with know-how
protection. If you do not have the valid password, you can only read the global data block
without information on the point of use. The global data block cannot be changed, however.
Know-how protection is not available for array data blocks (array DBs).
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Protection
10.6 Know-how protection
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
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