Application planning
6.5 Failure scenarios
S7-1500R/H redundant system
210 System Manual, 01/2024, A5E41814787-AF
Solution
Replace the defective CPU and the communications processor. You can find more information
on the procedure in the Replacing defective R/H CPUs (Page 446) and Replacing a defective
communications processor (Page 454) sections.
6.5.4 Specific failure scenarios with S7-1500H
6.5.4.1 Failure of both redundancy connections in S7-1500H ≤ 55 ms apart
Introduction
The following failure scenario describes the effects in case of a defect of the two redundancy
connections at S7-1500H using the example of a PROFINET ring. In this failure scenario, the
time between the redundancy connection failures is ≤ 55 ms.
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