Input And Output I/O Data Area (Advanced Option) - ICP DAS USA I-8124W User Manual

3.7 Input and Output I/O Data Area (Advanced Option)

Here exist two memory areas, "Remote Input Area" and "Remote Output
Area". The input data of all DeviceNet slaves would be stored in the "Remote
Input Area", and the output data of them would be in the "Remote Output Area".
Please refer to the Figure 3.10.
Figure 3.10 The Memory Mapping of the I-8124W
Users can read a bulk data from "Remote Input Area" in the I-8124W. This
bulk data contains multiple devices' input statuses. If one of the input status of
the remote DeviceNet slave changes, the corresponding data located in the
"Remote Input Area" would change immediately. Oppositely, the "Remote
Output Area" contains multiple devices' output data. Users may change the
output value of a certain device by changing the corresponding data located in
the "Remote Output Area".
There is another important thing. Uses need to know what the arrangement of
those data. The data of the slave with the smallest DeviceNet MAC ID would be
located in the most front of the Remote Input/Output Area. The data of the salve
with the following MAC ID would be located in the following section, and so on.
The data of the salve with the largest MAC ID would be located in the last
section of the Remote Input/Output Area. Here shows three examples about the
arrangement rule of the I-8124W.
I-8124W DeviceNet Master API functions User's Manual (V 1.6)
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