Communication
10.2 PROFINET
S7-1200 Programmable controller
566 System Manual, 03/2014, A5E02486680-AG
Data exchange between higher-level IO controller and normal IO-device
In this way, the IO controller and IO devices exchange data through PROFINET.
Data exchange between higher-level IO controller and I-device
In this way, the IO controller and the I-device exchange data through PROFINET.
The data exchange between a higher-level IO controller and an I-device is based upon the
conventional IO controller / IO device relationship.
For the higher-level IO controller, the transfer areas of the I-devices represent submodules of a
pre-configured station.
The output data of the IO controller is the input data of the I-
device. Analogously, the input data
of the IO controller is the output data of the I-device.
Transfer relationship between the user program and the transfer area
In this way, the user program and the transfer area exchange input and output data.
Data exchange between the user program and the I/O of the I-device
In this way, the user program and the centralized / distributed I/O exchange input and output
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