Addresses - Siemens SINAMICS S120 Function Manual

Communication PROFIBUS DP/PROFINET IO
10.3 Communication via PROFINET IO
PROFINET IO with RT (Real Time)
Real time means that a system processes external events over a defined period.
Process data and alarms are always transmitted in real time (RT) within the PROFINET IO
system. RT communication provides the basis for data exchange with PROFINET IO. Real-
time data are treated as a higher priority than TCP(UDP)/IP data. Transmission of time-
critical data takes place at guaranteed time intervals.
PROFINET IO with IRT (Isochronous Real Time)
Isochronous Real Time Ethernet: Real time property of PROFINET IO where IRT telegrams
are transmitted deterministically via planned communication paths in a defined sequence to
achieve the best possible synchronism and performance between the IO controller and IO
device (drive unit). This is also known as time-scheduled communication whereby
knowledge about the network structure is utilized. IRT requires special network components
that support planned data transfer.
Cycle times of minimum 500 μs and a jitter accuracy of less than 1 μs can be achieved when
this transmission method is implemented.
Figure 10-43 Bandwidth distribution/reservation, PROFINET IO
Note
Operation of S7-300 stations with SINAMICS drives: communication via PROFINET IO
currently only possible with RT and IRT High Flexibility. For SIMOTION with SINAMICS
drives: communication via PROFINET IO is also possible with IRT High Flexibility or IRT
High Performance.
10.3.1.3

Addresses

MAC address
Each PROFINET interface is assigned a worldwide unique device identifier in the factory.
This 6-byte long device identifier is the MAC address. The MAC address is divided up as
follows:
● 3 bytes manufacturer's ID and
● 3 bytes device identifier (consecutive number).
The MAC address is printed on a label (CBE20) or specified on the rating plate (CU310PN).
e.g.: 08-00-06-6B-80-C0
520
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions