315-4PN33

5.16 Extended know-how protection
Besides the "standard" Know-how protection the SPEED7-CPUs from
VIPA provide an "extended" know-how protection that serves a
secure block protection for accesses of 3. persons.
The standard protection from Siemens transfers also protected blocks
to the PG but their content is not displayed. But with according manip-
ulation the Know-how protection is not guaranteed.
The "extended" know-how protection developed by VIPA offers the
opportunity to store blocks permanently in the CPU. At the "extended"
protection you transfer the protected blocks into a WLD-file named
protect.wld. By plugging the MMC and following overall reset, the
blocks in the protect.wld are permanently stored in the CPU. You may
protect OBs, FBs and FCs. When back-reading the protected blocks
into the PG, exclusively the block header are loaded. The block code
that is to be protected remains in the CPU and cannot be read.
Create a new wld-file in your project engineering tool with ‘File
è Memory Card file è New
’ and rename it to "protect.wld". Transfer
the according blocks into the file by dragging them with the mouse
from the project to the file window of protect.wld.
Transfer the file protect.wld to a MMC storage module, plug the MMC
into the CPU and execute an overall reset with the following
approach:
The overall reset stores the blocks in protect.wld permanently in the
CPU protected from accesses of 3. persons.
Overview
Standard protection
Extended protection
Protect blocks with pro-
tect.wld
Transfer protect.wld to
CPU with overall reset
VIPA System 300SDeployment CPU 315-4PN33
Extended know-how protection
HB140 | CPU | 315-4PN33 | GB | 14-43 62