Using The User Program To Set Additional Access Protection - Siemens SIMATIC ET 200pro Operating Instructions Manual

Behavior of a password-protected CPU during operation
The CPU protection takes effect for an online connection after you have downloaded the
settings to the CPU.
Before an online function is executed, STEP 7 checks the admissibility and, if password
protection is configured, prompts the user to enter a password. You can only execute
password-protected functions from one programming device / PC at any time. Another
programming device/PC cannot log on.
Access authorization to the protected data is in effect for the duration of the online
connection or until you have rescinded the access authorization manually with "Online >
Delete access rights".
You can limit access to a password-protected CPU in RUN locally on the display. This
prevents access even with a password.
Access levels for F-CPU
For the fail-safe CPU, there is an additional access level besides the four access levels
described. You can find additional information about this access level in the description of
the fail-safe system SIMATIC Safety Programming and Operating Manual SIMATIC
Safety - Configuring and Programming
(https://support.industry.siemens.com/cs/ww/en/view/54110126).
7.3

Using the user program to set additional access protection

Access protection by means of the user program
There is another option to access protection via the display. You can also restrict access to a
password-protected CPU using the ENDIS_PW instruction in STEP 7.
You can find more information on this instruction in the STEP 7 online help under
"ENDIS_PW: Limit and enable password legitimation".
CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
Operating Instructions, 11/2019, A5E35873416-AC
7.3 Using the user program to set additional access protection
Protection
63