Table of Contents
11.3
Failure and replacement of components of PROFINET IO
11.3.1
Failure and replacement of a PROFINET IO device
Starting situation
Failure
The S7-400H is in redundant system state and an
IO device fails.
Procedure
Proceed as follows to replace an IO device:
Step
1
2
3
4
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB
Failure and replacement of components during redundant operation
11.3 Failure and replacement of components of PROFINET IO
What to do?
Switch off the power supply for the IO de-
vice.
Remove the bus connector.
Replace the IO device.
Plug the bus connector back in and turn the
power supply back on.
How does the system react?
Both CPUs signal the event in the diagnostics
buffer and via a corresponding OB.
How does the system react?
OB 86 and OB85 are called, the LED REDF
lights up, the corresponding LED BUSxF
flashes.
–
–
The CPUs process the rack failure OB
•
86 synchronously (outgoing event).
The IO device can be addressed by the
•
respective IO system.
199
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