Supplementary information
18.4 Configuring with STEP 7
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
303
Layout rules
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If there are not enough slots in the central controllers, you can increase the configuration
of an H system with expansion units.
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A fault-tolerant station may contain up to 20 expansion units.
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Assign racks with even numbers only to central controller 0, and racks with odd numbers
only to central controller 1.
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FMs and CPs can be operated only in racks 0 through 6.
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Pay attention to the rack numbers for operation of CPs for fault-tolerant communication in
expansion units:
The numbers must be directly sequential and begin with the even number, e.g., rack
numbers 2 and 3, but not rack numbers 3 and 4.
●
A rack number is also assigned for DP master no. 9 onwards if the central controller
contains DP master modules. The number of possible expansion units is reduced as a
result.
Compliance with the rules is monitored automatically by STEP 7 and considered accordingly
during configuration.
Additional I/O expansion
For use of distributed I/O, you can connect a DP master system in each of the two
subsystems. Connect a DP master system to the integrated interface of the CPU and others
via external DP master systems.
Note
PROFIBUS DP and PROFINET together
You can use both PROFINET IO devices and PROFIBUS DP stations on a CPU 410.
Note
Fail-safe signal modules
If you want to operate fail-safe modules redundantly on the PNIO interface, you need the S7
F Systems optional package V6.1 SP1 or higher.
18.4.2
Configuring hardware
You can use the SIMATIC PCS 7 wizard to create AS bundle configurations.
Another way of achieving a redundant hardware configuration is to initially assemble one
rack with all components to be implemented redundantly and to assign parameters to them.
The entire rack must then be copied and inserted. You adjust the network parameters
appropriately in the subsequent dialogs.
