Protection
8.2 Configuring access protection for the CPU
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
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Access levels for the CPUs
Table 8- 1
Access levels and access restrictions
Access levels
Access restrictions
Full access
(no protection)
Every user can read and change the hardware configuration and the blocks.
Read access
In this access level, only read access to the hardware configuration and the blocks is possible with-
out a password. HMI access and access to diagnostics data is also possible.
Neither blocks nor the hardware configuration can be downloaded to the CPUs without the pass-
word.
The following actions are not possible without the password either: Writing test functions and firm-
ware updates (online).
HMI access
The same access restrictions apply to HMI access as to read access.
The following actions are not possible without the password either: Change of operating state
(RUN/STOP) and display of online/offline comparison status.
No access (com-
plete protection)
When the CPUs have complete protection, no read or write access to the hardware configuration or
blocks is possible (without access authorization in the form of a password). HMI access is not pos-
sible either.
Authentication with the correct password provides full access to the CPUs again.
Reference
You can find a list of which functions are possible in the various protection levels in the
STEP 7 online help under "Setting options for protection".
Summary of Contents for Simatic S7-1500H
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