Functions
5.2 Intelligent IO devices (I-devices)
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
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① Data exchange between higher-level IO controller and normal IO-device
In this way, the IO controller and IO devices exchange data through PROFINET.
② 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 on the
conventional IO controller / IO device relationship.
For the higher-level IO controller, the transfer areas of the I-devices represent submodules of
a preconfigured 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.
③ 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.
④ 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
data.
⑤ Data exchange between the I-device and a lower-level IO device
In this way, the I-device and its IO devices exchange data. The data transfer is via
PROFINET.
Configuring the I-device
Introduction
There are basically two possibilities for configuration:
● Configuration of an I-device within a project
● Configuration of an I-device that is used in another project or in another engineering
system.
STEP 7 allows you to configure an I-device for another project or for another engineering
system by exporting a configured I-device to a GSD file. You import the GSD file in other
projects or engineering systems as with other GSD files. The transfer areas for the data
exchange, among other data, are stored in this GSD file.
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