Real-Time Communication; Figure 2: Profinet Communication Mechanism - TR-Electronic MP-Series Benutzerhandbuch

PROFINET general information

3.2 Real-Time Communication

Communications in PROFINET contain different levels of performance:
●
The non-time-critical transmission of parameter data, configuration data and
switching information occurs in PROFINET in the standard channel based on TCP
or UDP and IP. This establishes the basis for the connection of the automation
level with other networks.
●
For the transmission of time-critical process data PROFINET differentiates
between two real-time classes, which differentiate themselves regarding their
efficiency:
–
–

Figure 2: PROFINET communication mechanism

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Real-Time (RT Class1, RT)
- Use of standard components, e.g. switches
- Comparable Real-Time characteristics such as PROFIBUS
- Typical application field is the Factory Automation
- will be supported by the encoTRive
Isochronous-Real-Time (RT Class 3, IRT), *** not supported! ***
- Clock-synchronized data transmission
- Hardware support by switch-ASIC
- Typical application fields are drive controls in Motion Control Applications
TR - EMO - BA - DGB - 0019 - 08
Printed in the Federal Republic of Germany
06/06/2019