Failure Of The Two Profinet Lines In Profinet Ring 1 At The Primary Cpu With R1 - Siemens SIMATIC S7-1500 System Manual

Application planning
5.4 Redundancy scenarios
Diagnostics
System state, operating states and error displays after the failure of the interface module:
• Redundant system → RUN-Redundant system state
• Primary CPU/Backup CPU → RUN-Redundant operating state
– MAINT LED → yellow light: Interface module failed. The PROFINET ring 1 is open. No
NOTE
Deviating diagnostics display
If you remove an interface module of an R1 device, the other interface module signals this
error with a red flashing ERROR LED. The LED error display has no effect on the process
because the second interface module of the R1 device takes over.
In the STEP 7 online diagnostics, the R1 device is shown only as "Maintenance demanded,
error in lower-level component". The reason for this is the different diagnostics views of the
R1 device and H-CPU.
The IO device has only a local view and signals a missing module. The H-CPU, on the other
hand, has a higher-level view of the redundancy of the two interface modules. The
redundancy then results in the understated diagnostic information.
Therefore, when evaluating diagnostic information, pay attention not only to the LED error
display on the devices. For a complete evaluation of diagnostic information, you must also
look at the STEP 7 online diagnostics and evaluate the diagnostics buffer. You can find more
information in the Diagnostics
(https://support.industry.siemens.com/cs/ww/en/view/59192926) function manual.
Solution
Replace the defective interface module of the R1 device. You can find additional information
on the procedure in the section Replacing defective I/O devices/switches (Page 329).
5.4.5.6

Failure of the two PROFINET lines in PROFINET ring 1 at the primary CPU with R1

devices
Introduction
The following redundancy scenario describes the effects in case of a defect of both PROFINET
lines in PROFINET ring 1 at the primary CPU with R1 devices.
118
backup AR.
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD