Siemens CPU 1518-4 PN/DP ODK Manual page 17

Safety Integrated
The fail-safe CPUs are intended for users who want to implement demanding standard and
fail-safe applications both centrally and decentrally.
These fail-safe CPUs allow the processing of standard and safety programs on a single
CPU. This allows fail-safe data to be evaluated in the standard user program. The integration
also provides the system advantages and the extensive functionality of SIMATIC for fail-safe
applications.
The fail-safe CPUs are certified for use in safety mode up to:
● Safety class (Safety Integrity Level) SIL 3 according to IEC 61508:2010
● Performance Level (PL) e and Category 4 according to ISO 13849-1:2006 or according to
EN ISO 13849-1:2008
Additional password protection for F-configuration and F-program is set up for IT security.
Design and handling
All CPUs of the SIMATIC S7-1500 product series feature a display with plain text
information. The display provides the user with information on the order numbers, firmware
version, and serial number of all connected modules. In addition, the IP address of the CPU
and other network settings can be adapted locally without a programming device. Errors
messages are immediately shown on the display in plain text, thus helping customers to
reduce downtimes.
Uniform front connectors for all modules and integrated potential bridges for flexible
formation of potential groups simplifies storage. Additional components such as circuit
breakers, relays, etc., can be installed quickly and easily, since a DIN rail is implemented in
the rail of the S7-1500. The CPUs of the SIMATIC S7-1500 product series can be expanded
centrally and in a modular fashion with signal modules. Space-saving expansion enables
flexible adaptation to each application.
The system cabling for digital signal modules enables fast and clear connection to sensors
and actuators from the field (fully modular connection consisting of front connector modules,
connection cables and I/O modules), as well as easy wiring inside the control cabinet
(flexible connection consisting of front connectors with assembled single conductors).
System diagnostics and alarms
Integrated system diagnostics is activated by default for the CPUs. The different diagnostic
types are configured instead of programmed. System diagnostics information is shown
uniformly and in plain text on the display of the CPU, in STEP 7, on the HMI and on the Web
server, even for alarms related to drives. This information is available in RUN mode, but also
in STOP mode of the CPU. An automatic update of the diagnostics information is performed
when you configure new hardware components.
The CPU is available as a central interrupt server for 3 languages. The CPU, STEP 7 and
your HMI guarantee data consistency without additional engineering steps. The maintenance
work is easier.
CPU 1518-4 PN/DP ODK (6ES7518-4AP00-3AB0)
Manual, 09/2016, A5E35681108-AA
Product overview
2.1 Application
17