CP as PROFINET IO controller
6.1 Project engineering
Configuring and commissioning S7 CPs for Industrial Ethernet
116 Configuration Manual, 09/2013, C79000-G8976-C182-13
PROFINET IO with IRT communication (STEP 7 V5.5)
Configuring IRT
Use the following functions to configure IRT:
● PROFINET IO domain management
With domain management, you manage the synchronization role, the names of the sync
domain and other characteristics.
● Topology editor
The Topology editor supports the graphic interconnection of the devices involved in IRT
communication. On this basis, STEP 7 calculates the optimized flow of IRT
communication.
You can use these functions HW Config by selecting the menu command Edit > PROFINET
IO... > ...
Follow the procedure as described in the STEP 7 basic help in the section "Configuring IRT
Communication".
Configuring the limits of the sync domain
If you use the CP for IRT communication, you will need to configure the limits of the sync
domain for the relevant ports.
You can make the following settings in the "Boundaries" box in the parameter group for the
port properties:
● End of sync domain
Sync frames transferred to allow synchronization of nodes within a sync domain are not
forwarded to communications partners outside the sync domain.
● End of detection of accessible nodes
Select the option, if you do not want frames to be sent or received via the port to locate
IRT-compliant modules in the network.
If the option is disabled, information according to the DCP protocol is sent and received to
allow discovery of the IRT-compliant modules in the network.
● End of topology discovery
Select this option if you do not want frames for discovery of the neighborhood as part of
topology planning to be sent via the port.
If the option is disabled, information according to the LLDP protocol is sent to allow
neighborhood discovery.
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