Failure Of One Redundancy Connection And The Primary Cpu In S7-1500H - Siemens Simatic S7-1500R System Manual

Application planning
3.5 Failure scenarios
3.5.4.2

Failure of one redundancy connection and the primary CPU in S7-1500H

Introduction
The following failure scenario describes the effects of a defect in a redundancy connection
and the primary CPU in S7-1500H. In this failure scenario, the time between the redundancy
connection failure and the Primary CPU is > 1500 ms.
Failure scenario
①
②
③
④
⑤
⑥
Figure 3-20
86
Primary CPU → failed (2nd failure in runtime sequence)
Backup CPU
One fiber-optic cable (redundancy connection) → interrupted (1st failure in runtime sequence)
IO device ET 200SP
IO device ET 200MP
PROFINET cable (PROFINET ring)
Failure of one redundancy connection and the primary CPU
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA