Access Protection With Sfc 109 - Siemens SIMATIC PCS 7 Operating Manual

Configuring S7F/FH hardware
6.1 Adapting CPU parameters (single F-system)
As of PCS 7 V8.1, you can encrypt the CPU password assigned by the hardware
configuration in the project data management. The increased password security is only
relevant for the engineering system. If the check box is selected, the password entered in the
data management is stored encrypted. This setting increases the password security. The
function of the password remains the same.
NOTICE
Using the "Increased password security" functionality
Projects in which the "Increased password security" option is activated may only continue
to be used in STEP 7 V5.5 SP4 or higher, because this functionality is not backwards
compatible!
Note
At least protection level 1 and "Can be bypassed by password" must be configured.
In addition, the fail-safe program is assigned a password that is created the first time the
safety-related software or hardware is used. This password must not be the same as the
CPU password.
6.1.2

Access protection with SFC 109

There is an additional mode for SFC 109 as of firmware V6.0 of the H-CPU. With MODE =
12, protection level 3 can be set without password authorization.
Calling of SFC 109 with MODE=0
Setting the protection level: Any applicable block that is present on password authorization is
lifted through this call.
Calling of SFC 109 with MODE=1
Setting of protection level 2 with password authorization: This means that you can lift the
write protection set with SFC 109 when knowing the valid password. Any applicable block
that is present on password authorization is lifted through this call.
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Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB