Replacement of failed components during redundant operation
13.2 Replacement of components of the distributed I/O on PROFINET IO
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
231
Replacement of an IM 460 and IM 461 interface module
Starting situation
How does the system react?
The S7-400H is in redundant system mode and
an interface module fails.
• The connected expansion unit is turned off.
• Both CPUs report the event in the diagnostic
buffer and via OB 86.
Follow the steps below to replace an interface module:
How does the system react?
1 Turn off the power supply of the central
rack.
• The partner CPU switches to single
mode.
2 Turn off the power supply of the expansion
unit in which you want to replace the inter-
–
3 Remove the interface module. –
4 Insert the new interface module and turn
the power supply of the expansion unit
–
5 Switch the power supply of the central unit
back on and start the CPU.
• The CPU performs an automatic LINK-
UP and UPDATE.
• The CPU changes to RUN and operates
as the reserve CPU.
Replacement of components of the distributed I/O on PROFINET IO
13.2.1
Replacement of a PROFINET IO device
Starting situation
How does the system react?
The S7-400H is in the redundant system state
Both CPUs signal the event in the diagnostics
buffer and via a corresponding OB.
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