Routing
10.4 Data record routing
Communication
Function Manual, 11/2019, A5E03735815-AH
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Enabling/disablng IP forwarding
To enable IP forwarding, proceed as follows:
1. Select the CPU in the network view of STEP 7 (TIA Portal).
2. In the properties of the CPU of the Inspector window, navigate to "General" > "Advanced
Configuration" > "IP forwarding".
3. In the "Configuration IPv4 Forwarding" area, select the check box "Activate IPv4 for
interfaces of this PLC".
Figure 10-12 Enabling IP forwarding
Result: IP forwarding is enabled for all interfaces of the S7-1500 CPU.
You disable IP forwarding by clearing the check box "Enable IPv4 forwarding for interfaces of
this PLC".
10.4 Data record routing
Definition of data record routing
Data can be sent over PROFINET from an engineering station to field devices via multiple
networks. Since the engineering station addresses the field devices using standardized
records and these records are routed via S7 devices, the term "data record routing" is used
to refer to this type of routing.
The data sent using data record routing include the parameter assignments for the
participating field devices (slaves) and device-specific information (e.g. setpoint values, limit
values).
Data record routing is used, for example, when field devices of different manufacturers are
used. The field devices are addressed using standardized data records ( PROFINET) for
configuration and diagnostics.
Data record routing with STEP 7
You can perform data routing with STEP 7 by calling a device tool (for example, PCT) via the
TCI interface (Tool Calling Interface) and passing call parameters. The device tool uses the
communication paths that STEP 7 also uses for communication with the field device.
No configuration is required for this type of routing except the installation of the TCI tools on
the STEP 7 computer.
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