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Addressing
If you are using switched I/O, you always use the same address when addressing the I/O.
Further I/O expansion
If there are insufficient slots in the central controllers, you can expand the installation of a
fault-tolerant system with expansion units.
You can assign racks with even numbers only to central controller 0, and racks with odd
numbers only to central controller 1.
For use of distributed I/O, you can connect a DP master system in each of the two
subsystems. Connect a DP master to the integrated interface of the CPU and others by
means of external DP master systems.
Note
PROFIBUS DP and PROFINET IO in combination
You can use PROFINET IO devices as well as PROFIBUS DP stations on a CPU 410.
Distributed I/O over PNIO
You can also operate distributed PROFINET I/O on the integrated PROFINET IO interface.
4.5
Using single-channel switched I/O
What is single-channel switched I/O?
In the single-channel switched configuration, the input/output modules are present singly
(single-channel).
In redundant operation, these can addressed by both subsystems.
In solo operation, the master subsystem can always address all switched I/Os (in contrast to
one-sided I/O).
The single-channel switched I/O configuration is recommended for system components
which tolerate the failure of individual modules within the ET 200M or ET 200iSP.
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
I/O configuration variants
4.5 Using single-channel switched I/O
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