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A Web server is integrated in the CPU. You can read out the following information with
the Web server:
– Start page with general CPU information
– Identification information
– Contents of the diagnostics buffer
– Query of module states
– Firmware update
– Alarms (without acknowledgment option)
– Information about communication
– PROFINET topology
– Tag status, writing tags
– Watch tables
– Memory usage
– User pages
– Data logs (if used)
– Online backup and restoration of the configuration.
– Diagnostic information for the motion control technology objects
– Display of trace recording stored on the SIMATIC memory card
– Readout service data
– Basic Web pages
– Display of the Web server in 3 project languages, for example, comments and
message texts
– Reces
– User-defined Web pagesThe alarms for the system diagnostics are automatically created by the system and
displayed on a PG/PC, HMI device, Web server or the integrated display. System
diagnostics information is also available when the CPU is in STOP mode.The know-how protection protects user blocks against unauthorized access and
modifications.
– Copy protection
Copy protection links user blocks to the serial number of the SIMATIC memory card or
to the serial number of the CPU. User programs cannot run without the corresponding
SIMATIC memory card or CPU.
– Access protection
Extended access protection provides high-quality protection against unauthorized
configuration changes. You can use authorization levels to assign separate rights to
different user groups.
– Integrity protection
The system protects the data transferred to the CPU against manulation. The CPU
detects erroneous or manulated engineering data.
● Additional functions:
– PROFIenergy
You can find information on the topic of "PROFIenergy" in the PROFINET function EDs for the current operating mode and diagnostics status of the CPU
② Display
③ Operator control buttons

Figure 2-2 View of the CPU 1511-1 PN (with front panel) - front
Note
Temperature range for display
To increase its service life, the display switches off at a temperature below the permitted
operating temperature of the device. When the display cools down, it automatically switches
itself on again. When the display is switched off, the LEDs continue to show the status of the
CPU.
For more information on the temperatures at which the display switches itself on and off,
refer to the Technical specifications (Page 33)If you remove or attach the front panel of an automation system during operation,
personal injury or damage to property can occur in zone 2 hazardous areas.
Before you remove or fit the front panel, always switch off the power supply to the
automation system in hazardous area zone 2. The CPU maintains its operating mode.
Locking the front panel
You can lock the front panel to protect your CPU against unauthorized access.
You can attach a security seal or a padlock with a diameter of 3 mm to the front panel.In addition to the mechanical lock, you can also block access to a password-protected CPU
on the display (local lock) and assign a password for the display. You can find additional
information on the display, configurable protection levels and local locks in the , ET EDs for the current operating mode and diagnostic status of the CPU
② Display connector
③ Slot for the SIMATIC memory card
④ Mode selector
⑤ LEDs for the 2 ports of the PROFINET interface X1
⑥ MAC address
⑦ PROFINET IO interface (X1) with 2 ports
⑧ Connector for power supply
⑨ Fixing screw
Figure 2-4 View of the CPU 1511-1 PN (without front panel) - fronThe assignment corresponds to the Ethernet standard for an RJ45 plug.
● When autonegotiation is deactivated, the RJ45 socket is allocated as a switch (MDI-X).