Diagnostics
System state, operating states and error displays after the failure of the redundancy
connections and PROFINET cable:
•
Redundant system → RUN-Solo system state
•
Primary CPU → RUN operating state
–
MAINT LED → yellow light: The H-system is not in the RUN-Redundant system state. No
partner CPU has been found in the H-system. The PROFINET ring is open (requirement:
Primary CPU is MRP Manager).
•
Backup CPU → STOP operating state
–
MAINT LED → yellow light: The H-system is not in the RUN-Redundant system state. No
partner CPU has been found in the H-system.
NOTE
To get detailed diagnostics information, evaluate the diagnostics buffer.
Solution
Replace the defective redundancy connections and the defective PROFINET cable. You can
find more information on the procedure in the following sections:
•
Replacing defective redundancy connections (Page 322)
•
Replacing defective PROFINET cables
5.4.5.4 Failure of the two PROFINET cables in the PROFINET ring on the backup CPU
Introduction
The following redundancy scenario describes the effects of a defect of both PROFINET cables
in the PROFINET ring at the backup CPU.
114
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
Application planning
5.4 Redundancy scenarios
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