Siemens SIMATIC ET 200AL, System Manual

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Description
2.1 Introduction to PROFINET
PROFINET with STEP 7
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Function Manual, 05/2021, A5E03444486-AL
Functional differences of the PROFINET interfaces
PROFINET interfaces can provide different functions. PROFINET interface functions include
identification, configuration, diagnostics and communication services (e.g., open
communication). PROFINET interfaces that provide PROFINET IO functions and network
security functions are also available.
The following table illustrates the differences using the example of the CPU 1516-3 PN/DP (as
of firmware version V2.0), which features two PROFINET interfaces with different
functionality.
Table 2- 5 Differences between the PROFINET interfaces of the CPU 1516-3 PN/DP (as of firmware
version V2.0)
PROFINET interface (X1) PROFINET interface (X2)
2 ports with PROFINET IO functionality: 1 port with PROFINET IO functionality:
Identification, configuration and diagnostics
PG communication
HMI communication
S7 communication
Time-of-day synchronization
Web server
Open communication
OPC UA server
IO controller
I-device
RT
IRT -
Isochronous mode -
Media redundancy -
Prioritized startup -
Additional Information on the Functionality of PROFINET interfaces
You can find information on the number and functionality of the interfaces of a PROFINET
device in the documentation for the specificPROFINET device.
PROFINET communication services are described in the Communication function manual
( http://support.automation.siemens.com/WW/view/en/59192925 ).
In the Network security (Page 1) section you can find components that are used to protect
networks against hazards.
The Functions (Page 1) section describes the PROFINET IO functions.