Siemens CPU 410-5H Process Automation - Failure and Replacement of Components of PROFINET IO; Failure and Replacement of a PROFINET IO Device; Failure and Replacement of PROFIBUS IO Cables

Failure and replacement of components during redundant operation
11.3 Failure and replacement of components of PROFINET IO
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
179
11.3
Failure and replacement of components of PROFINET IO
11.3.1
Failure and replacement of a PROFINET IO device
Starting situation
Failure
How does the system react?
The S7-
400H is in redundant system state and an
IO device fails.
Both CPUs signal the event in the diagnostics
buffer and via a corresponding OB.
Procedure
Proceed as follows to replace an IO device:
Step
What has to be done?
How does the system react?
1 Switch off the power supply for the IO
device.
–
2
Remove the bus connector.
–
3
Replace the IO device.
–
4
Plug the bus connector back in and turn the
power supply back on.
• The CPUs process the rack failure OB
86 synchronously (outgoing event)
• The IO device can be addressed by the
respective IO system.
11.3.2
Failure and replacement of PROFIBUS IO cables
Starting situation
Failure
How does the system react?
The S7-400H is in redundant system state and
the PROFINET IO cable is defective.
• With single-channel one-sided I/O:
Rack failure OB (OB 86) is started (incoming
event). The IO controller can no longer
process connected IO cables
(station failure).
• With switched I/O:
I/O redundancy error OB (OB 70) is started
(incoming event). The IO cables are
addressed via the IO controller of the partner.