Application planning
6.4 Redundancy scenarios
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
187
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.
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 447)
• Replacing defective PROFINET cables
To Next Page
Loading...
Need help?
General
