I/o process image map – Beijer Electronics NA-9379 User Manual
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MODBUS Programmable I/O NA-9379
FnIO S-Series
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2.2. I/O Process Image Map
An expansion module may have 3 types of data as I/O data, configuration parameter and memory register.
The data exchange between network adapter and expansion modules is done via an I/O process image data by
internal-protocol. The following figure shows the data flow of process image between network adapter and
expansion modules.