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.
352),1(7,(
① CPU 1518HF-4 PN
② Redundancy connections (fiber-optic cables)
③ ET 200SP IO device for controlling the conveyor belt
④ PROFINET cables (PROFINET ring)
⑤ ET 200SP IO device with fail-safe modules for evaluating the emergency stop buttons
⑥ Emergency stop buttons
Figure 4-20Configuration with CPUs 1518HF-4 PN and ET 200SP with fail-safe modules
57
System overview
4.3 S7-1500 R/H-CPUs
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
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