Functions
5.2 Intelligent IO devices (I-devices)
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Function Manual, 05/2021, A5E03444486-AL
5.2.4
Data Exchange between higher- and lower-level IO system
Introduction
The next chapter shows the data exchange between the higher- and lower-level IO system.
Transfer areas
Transfer areas are an interface to the user program of the I-device CPU. Inputs are processed
in the user program and outputs are the result of the processing in the user program.
The data for communication between IO controller and I-device is made available in the
transfer areas. A transfer area contains an information unit that is exchanged consistently
between IO controller and I-device. You can find more information on configuration and use
of transfer areas in the section Configuring the I-device (Page 1).
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