Configuring Sync Domains - Siemens SINUMERIK 840D sl Configuration Manual

Configuring networks
5.5 Configuring PROFINET IO with IRT
5.5.10

Configuring sync domains

All PROFINET devices that participate on the IRT communication are synchronized to a
common clock. The devices must belong to a sync domain. Just one device has the role of the
sync master (clock generator) in a sync domain; all other devices have the role of a sync slave.
For SINUMERIK, the PROFINET IO controller serves as sync master in the PLC.
Rules
● The configured PROFINET topology must match the actual wiring of the hardware.
● PROFINET devices that do not participate on the IRT communication, namely not
synchronized, are also not part of a sync domain.
● Devices that do not belong to the sync domain may not be contained in the PROFINET
topology between a node of a sync domain and its sync master.
How to remove or add nodes from or to a sync domain is described under "Specifying nodes
of a sync domain" in the TIA Portal online help.
Procedure
To configure the sync domain in the properties of the PROFINET IO system, proceed as follows:
1. In the network view, select the PROFINET IO system.
Figure 5-8
2. Select the "PROFINET > Domain management > Sync-Domain_1" entry in the "Properties
> General" inspector window.
110
Selecting the PROFINET IO system
SINUMERIK STEP 7 Toolbox V15.1
Configuration Manual, 12/2018, A5E46279635B AA