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SI-PROFINET RT User Guide
Issue Number: 2
6.3.2 Configuring the network topology for DCP
In order to use the network discovery and configuration protocol, the PLC must be
correctly configured and programmed with the physical network topology, the following
information is intended as a guide only, for more specific information (in particular for
other types of PLC's), then please consult the PLC documentation.
Although the Siemens PLC is mentioned in this manual, Control Techniques does not
recommend or endorse any particular PLC or controller manufacturer.
The following information relates to the Siemens S7-315 2 PN/DP PLC.
The PLC must be configured to support device replacement, this is an option in the
properties of the PROFINET port. In the hardware configuration screen of the SIMATIC
STEP7 application, either double click the port, or alternatively select the port, right click
it and select 'Object Properties…' as shown in Figure 6-2. Ensure the option 'Support
device replacement without exchangeable medium' is selected then click the 'OK'
button.
Figure 6-2 PLC device replacement option
The network topology must now be configured. From the hardware configuration
screen, select the port, right click it and select 'PROFINET IO Topology…', the topology
editor will be displayed, select the 'Graphic view' tab and using 'drag and drop', connect
the relevant device ports together to match the physical network wiring. The program
must then be compiled and downloaded to the PLC in the normal manner.
NOTE
