Access-Protected Blocks - Siemens SIMATIC PCS 7 System Manual

● The set protection levels of both fault-tolerant CPUs are retained if you make
modifications to the plant during operation.
● The protection level is transferred to the target CPU in the following cases:
– Switch to CPU with modified configuration
– Switching to a CPU with modified PO limit
– Switching to a CPU with modified operating system
– Switching to a CPU using only one intact redundant link
9.2

Access-protected blocks

S7-Block Privacy
The STEP 7 add-on package S7-Block Privacy can be used to protect the functions and
function blocks against unauthorized access.
Observe the following information when using S7-Block Privacy:
● S7-Block Privacy is operated by means of shortcut menus. To view a specific menu help,
press the "F1" function key.
● You can no longer edit protected blocks in STEP 7. Moreover, testing and commissioning
functions such as "Monitor blocks" or breakpoints are no longer available. Only the
interfaces of the protected block remain visible.
● Protected blocks can only be released again for editing if you have the correct key and
the corresponding decompilation information included in your package. Make sure that
the key is always kept in a safe place.
● If your project contains sources, you can use these to restore the protected blocks by
means of compilation. The S7-Block Privacy sources can be removed from the project.
Note
Memory requirements
Each protected block with decompilation information occupies 232 additional bytes in load
memory.
Each protected block without decompilation information occupies 160 additional bytes in load
memory.
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 09/2014, A5E32631667-AB
Special functions of the CPU 410-5H
9.2 Access-protected blocks
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