Siemens SIMATIC S7-1500 System Manual page 109

System overview
5.3 S7-1500 R/H-CPUs
Feature
You need the 1518HF-4 PN CPUs. With the integrated F-functionality, you evaluate the
emergency stop buttons via PROFIsafe.
Solution
If one of the CPUs fails (loss of redundancy), the S7-1500HF redundant system switches from
the RUN-Redundant system state to the RUN-Solo system state. The HF-system reduces the
probability of an F-STOP being triggered on failure of a CPU.
You evaluate the emergency stop buttons at the track switch positions and transshipment
facilities via fail-safe modules in the ET 200SP distributed I/O system. If a dangerous situation
or a baggage jam occurs, an employee presses the emergency stop button.
Result: The redundant system shuts down the conveyor belt immediately via PROFIsafe.
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②
③
④
⑤
⑥
Figure 5-23
108
CPU 1518HF-4 PN
Redundancy connections (fiber-optic cables)
ET 200SP IO device for controlling the conveyor belt
PROFINET cables (PROFINET ring)
ET 200SP IO device with fail-safe modules for evaluating the emergency stop buttons
Emergency stop buttons
Configuration with CPUs 1518HF-4 PN and ET 200SP with fail-safe modules
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF