PROFINET IO
6.1 Introduction
CPU 410-5H Process Automation
96 System Manual, 09/2014, A5E31622160-AB
RT communication (real-time communication)
RT communication is the basic communication mechanism for PROFINET IO and is used
during device monitoring. The transmission of real-time data with PROFINET IO is based on
the cyclic data exchange with a provider-consumer model. To better scale the
communication options and therefor the determinism for PROFINET IO, real-time classes
have been defined for data exchange. These are unsynchronized and synchronized
communication. The details are handled independently in the field devices. Real-time
automatically includes an increase in priority with PROFINET compared to UDP/IP frames.
This is necessary to prioritize the transmission of data in the switches so that RT frames are
not delayed by UDP/IP frames. RT communication is interrupted (station failure) if the
reconfiguration time of the ring is greater than the selected response monitoring time of the
IO device. The same applies to IO devices configured with MRP outside the ring.
Documentation on the Internet
Comprehensive information about PROFINET (http://www.profibus.com/) is available on the
Internet.
Also observe the following documents:
● Installation guideline
● Assembly guideline
● PROFINET_Guideline_Assembly
Additional information on the use of PROFINET IO in automation engineering is available at
the following Internet address (http://www.siemens.com/profinet/).
To Next Page
Loading...
Need help?
General
