Siemens Simatic S7-1500H - Failure of both PROFINET Lines between Two R1 Devices in a Line Topology

Diagnostics
System state, operating states and error displays after the failure of both PROFINET cables:
•
Redundant system → RUN-Redundant system state
•
Primary CPU/Backup CPU → RUN-Redundant operating state
–
MAINT LED → yellow light: The PROFINET ring 1 is open. No backup AR.
NOTE
To get detailed diagnostics information, evaluate the diagnostics buffer.
Solution
Replace the defective PROFINET cables. You can find additional information on the procedure
in the section Replacing defective PROFINET cables (Page 326).
5.4.5.7 Failure of both PROFINET lines between two R1 devices in a line topology
Introduction
The following redundancy scenario describes the effects of a failure of both PROFINET lines
between two R1 devices in a line topology.
120
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
Application planning
5.4 Redundancy scenarios