Siemens SIMATIC CPU 410 System Manual page 113

Result:
The operating state of the selected CPU can be identified based on the display of the
selected CPU in the "Diagnose hardware" dialog:
CPU icon
Note
The view is not updated automatically in the Online view. Use the F5 function key to view the
current operating state.
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
Operating state of the respective CPU
Master CPU is in RUN operating state
Standby CPU is in RUN operating state
Master CPU is in STOP operating state
Standby CPU is in STOP operating state
Master CPU is in STARTUP operating state
Master CPU or a module whose parameters it assigned is faulty.
Standby CPU or a module whose parameters it assigned is faulty
Maintenance required on master CPU
Maintenance required on standby CPU
Maintenance request on master CPU
Maintenance request on standby CPU
System and operating states of the CPU 410
7.2 System states of the redundant CPU 410
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