Specific Failure Scenarios With S7-1500H; Failure Of Both Redundancy Connections In S7-1500H ≤ 1500 Ms Apart - Siemens Simatic S7-1500R System Manual

Application planning
3.5 Failure scenarios
3.5.4

Specific failure scenarios with S7-1500H

3.5.4.1 Failure of both redundancy connections in S7-1500H ≤ 1500 ms apart
Introduction
The following failure scenario describes the effects of a defect in each of the two redundancy
connections in S7-1500H. In this failure scenario, the time between the redundancy
connection failures is ≤ 1500 ms.
Failure scenario
①
②
③
④
⑤
⑥
Figure 3-19
84
Primary CPU
Backup CPU
Two fiber-optic cables (redundancy connections) → interrupted
IO device ET 200SP
IO device ET 200MP
PROFINET cable (PROFINET ring)
Failure of both redundancy connections
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA