Introduction To The I/O Link To Fault-Tolerant System - Siemens SIMATIC PCS 7 CPU 410-5H System Manual

I/O configuration variants

4.4 Introduction to the I/O link to fault-tolerant system

4.4 Introduction to the I/O link to fault-tolerant system
I/O installation types
In addition to the power supply module and CPUs, which are always redundant, the
operating system supports the following I/O installation types. You specify the I/O installation
types in the configuration with HW Config.
Configuration
Single-channel switched
System-redundant
Two-channel redundant
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.
See section System redundancy (Page 70).
Note
Fail-safe signal modules
If you want to operate fail-safe modules redundantly at the PNIO interface, you require the
optional package S7 F Systems as of V6.1 SP1.
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Availability
Increased
Increased
High
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB