Siemens S7-1200 System Manual page 566

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Table of Contents

Communication

10.2 PROFINET

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

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG