Application planning
3.5 Failure scenarios
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
83
Solution
Replace the defective IO device and the defective primary CPU. You can find additional
information on the procedure in the sections Replacing defective R/H CPUs (Page 260) and
Replacing defective I/O devices/switches (Page 268).
Note
Proceed as follows if you have ensured that the CPU is still working in the STOP operating
state and can access all important IO devices:
1.
Replace the defective IO device.
2.
Switch the CPU from STOP operating state to the RUN operating state.
3.
Replace the defective CPU. Switch the new CPU to the RUN operating state.
Summary of Contents for Simatic S7-1500H
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