Application planning
6.4 Redundancy scenarios
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
173
6.4.2 Failure of the primary CPU
Introduction
The following redundancy scenario describes the effects of a defective primary CPU using the
example of a PROFINET ring.
Redundancy scenario
Backup CPU → becomes new primary CPU
PROFINET cable (redundancy connections, PROFINET ring)
IO device ET 200MP (with system redundancy S2)
IO device ET 200SP (with system redundancy S2)
Standard IO device ET 200SP
Figure 6-32 Failure of the primary CPU (using S7-1500R as an example)
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