Application planning
3.5 Failure scenarios
S7-1500R/H redundant system
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System Manual, 10/2018, A5E41814787-AA
Diagnostics
System state, operating states and error displays after the failure of an IO device:
●
Redundant system → RUN
-Redundant system state
●
Primary CPU → RUN
-Redundant operating state
–
MAINT LED: → yellow light: The PROFINET ring is o
pen.
–
ERROR LED → flashes red: An IO device has failed.
●
Backup CPU → RUN
-Redundant operating state
–
MAINT LED → yellow light: The PROFINET ring is open.
–
ERROR LED → flashes red: An IO device has failed.
Note
To get detailed diagnostics information, evaluate the diagnostics buffer.
Solution
Replace the defective IO device. You can find additional information on the procedure in the
section Replacing defective I/O devices/switches (Page 268).
Summary of Contents for Simatic S7-1500H
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