Safety Programming Guideline
Entry ID: 109750255, V1.0, 10/2017
2.6 Know-how protection
STEP 7 Safety V14 or higher allows you to activate know-how protection for fail-
safe blocks (FCs and FBs).
Know-how protection protects specific program parts against access by
unauthorized persons, regardless of the F-CPU's and the safety program's access
protection. The contents of an FC or FB cannot be viewed or modified without a
password.
Recommendation
During the project phase, determine to what extent it makes sense to protect the
blocks of a safety program against third-party access.
Advantages
Protects your know-how across contents of program parts.
Accepted blocks cannot be modified.
Additional information
The following documentation provides instructions for using know-how protection
for different scenarios:
https://support.industry.siemens.com/cs/ww/en/view/109742314
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