Configuring Profinet Io; General Information About Communication Via Profinet Io - Siemens SIMOTION D410-2DP/PN Installation Manual

Parameter assignment / addressing

6.5 Configuring PROFINET IO

6.5 Configuring PROFINET IO
6.5.1

General information about communication via PROFINET IO

Communication cycle
In PROFINET, the communication cycle is subdivided into different, time-specific intervals.
The first interval is used for isochronous real‑time communication (IRT), followed by real‑time
communication (RT) and standard TCP/IP communication. The bandwidth reservation for IRT
ensures that RT communication and standard communication have no effect on the
transmission of IRT telegrams, which are important for motion control applications.
The following figure shows how the PROFINET communication cycle is divided into
isochronous real-time communication (IRT), real-time communication (RT), and standard TCP/
IP communication.
Figure 6-6
Isochronous real-time Ethernet
STEP 7 can be used to configure PROFINET devices supporting data exchange via
isochronous real-time Ethernet (IRT). IRT telegrams are transmitted deterministically via
planned communication paths in a defined sequence to achieve the best possible synchronism
and performance.
IRT requires special network components supporting a planned data transfer.
Isochronous operation and mode
Equidistant mode and isochronous mode function similarly in PROFINET IO to the way they
function in PROFIBUS DP.
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PROFINET communication cycle
Commissioning and Hardware Installation Manual, 01/2015
SIMOTION D410-2