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PROFINET is the standard for industrial Ethernet in automation

It is based on IEC 61158 and IEC 61784 and supports three communications services:

  • Standard TCP/IP for non-deterministic functions such as parametrization, video/audio transmissions and data transfer to higher level IT systems.
  • Real Time (PROFINET RT): It bypasses the TCP/IP layers in order to give deterministic performance for automation applications in the 1-10ms range and can be used for typical I/O applications, including motion control and high performance requirements.
  • Isochronous Real Time (PROFINET IRT): The signal prioritization and scheduled switching deliver high precision synchronization for e.g. motion control application. Bus cycle rates in the micro second range are possible, with jitter in the sub-microsecond range.

All three services can be used simultaneously.

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