Failure Of The Primary Cpu - Siemens SIMATIC S7-1500 System Manual

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
①
②
③
④
⑤
⑥
⑦
Figure 6-32
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
Primary CPU → failed
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)
Switch
Standard IO device ET 200SP
Failure of the primary CPU (using S7-1500R as an example)
Application planning
6.4 Redundancy scenarios
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