Configuring Networking - Siemens SIMATIC S7-400H System Manual

12.2.5

Configuring networking

The fault-tolerant S7 connection is a separate connection type of the "Configure Networks"
application. The following communication partners can communicate with each other:
● S7–400 H station (with 2 fault-tolerant CPUs)-> S7–400 H station
● S7–400 H station (with 1 fault-tolerant CPU) -> S7–400 H station
● S7–400 H station (with 1 fault-tolerant CPU) -> S7–400 H station
● SIMATIC PC stations -> S7–400 H station (with 2 fault-tolerant CPUs)
When this type of connection is being configured, the application automatically determines
the number of possible connection paths:
● If two independent but identical subnets are available which are both suitable for an S7
● If only one DP master system is available - in practice typically fiber-optic cables - four
Downloading the network configuration to the fault-tolerant station
The network configuration can be downloaded to the entire fault-tolerant station in one pass.
To do this, the same requirements must be met as for downloading the network configuration
to a standard station.
S7-400H
System Manual, 09/2007, A5E00267695-03
(with 2 fault-tolerant CPUs)
(with 2 fault-tolerant CPUs)
(with 1 fault-tolerant CPU)
connection (DP master systems), two connection paths will be used. In practice these are
generally electrical networks, each a CP in a subnet:
connection paths are used for a connection between two fault-tolerant stations. All the
CPs are in this subnet:
Configuring with STEP 7
12.2 Configuring with STEP 7
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