Domain Management - Datalogic AMT58*-PN Series Instruction Manual

AMT58x-PN ProfiNET®

11.6 Domain Management

WARNING
The configuration of the Sync domain requires both in-depth skills
and specific expertise in SIMATIC STEP 7 programming
environment. For detailed information please consult the STEP 7
Programmer's handbook and documentation.
In the case of PROFINET IO with IRT, a sync master transmits a
synchronization message to which all sync slaves synchronize
themselves. The synchronization mechanisms will be controlled by
ERTEC (Enhanced Real-Time Ethernet Controller) of the integrated
PROFINET interface. This ensures a synchronization accuracy of
less than one microsecond. The synchronization of all IRT-capable
PROFINET devices on a common time base is the prerequisite for
the scheduled communication control and the bandwidth reservation.
You assign the device roles syn master and sync slave by
configuring the PROFINET devices in STEP 7, as described below.
The role of a sync master can be assigned both to an IO controller as
well as a switched configured on an IO device, provided these
support the "sync master" function.
The sync master and the sync slaves together form the sync domain.
A sync domain has exactly one active sync master - for the runtime.
It is mandatory that all PROFINET devices that are to be
synchronized via PROFINET IO with IRT must belong to a sync
domain. The sync domain consists of precisely one sync master and
at least one sync slave. IO controllers and switches can hold the role
of a sync master or sync slave. Other IO devices support only the
role as sync slave. An IRT Class 3 Device must be member of a sync
domain too. The properties of the sync domain must be set in the
dialog boxes described in this section, especially the cycle time of the
send clock. Only those values may be entered which are common to
both the Master and all devices on the bus.
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