Specific Failure Scenarios With S7-1500R; Two Cable Interruptions In The Profinet Ring In S7-1500R > 1500 Ms Apart - Siemens SIMATIC S7-1500 System Manual

Application planning
5.5 Failure scenarios
Diagnostics
System state, operating states and error displays after the failure of a switch:
• Redundant system → RUN-Redundant system state
• Primary CPU/Backup CPU → RUN-Redundant operating state
– MAINT LED → yellow light: The PROFINET ring is open.
– ERROR LED → flashes red: One or more IO devices have failed.
Failure of the redundant system
If the primary CPU fails in addition to the PROFINET cable, the backup CPU switches to the
STOP operating state. You can find more information in the section Failure of the primary
CPU when IO devices have failed in the PROFINET ring (Page 132).
NOTE
To get detailed diagnostics information, evaluate the diagnostics buffer.
Solution
Replace the defective switch. You can find additional information on the procedure in the
section Replacing defective I/O devices/switches (Page 329).
5.5.3

Specific failure scenarios with S7-1500R

5.5.3.1 Two cable interruptions in the PROFINET ring in S7-1500R > 1500 ms apart
Introduction
The following failure scenario describes the effects of two cable interruptions in the PROFINET
ring. In this failure scenario, the time between the two cable interruptions is > 1500 ms.
128
WARNING
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD