ProSoft Technology MVI69-DNPSNET - Manual (Page 67)

Reference MVI69-DNPSNET ♦ CompactLogix or MicroLogix Platform
Distributed Network Protocol Interface Module
ProSoft Technology, Inc. Page 67 of 119
November 3, 2008
The following illustration shows the data transfer method used to move data
between the CompactLogix or MicroLogix processor, the MVI69-DNPSNET
module and the DNP Network.
All data transferred between the module and the processor over the backplane is
through the input and output images. Ladder logic must be written in the
CompactLogix or MicroLogix processor to interface the input and output image
data with data defined in the Controller Tags. All data used by the module is
stored in its internal databases. These databases are defined as a virtual DNP
data tables with addresses from 0 to the maximum number of points for each
data type. The following illustration shows the layout of the databases:
DATA AREA
BINARY INPUTS
ANALOG INPUTS
FLOAT INPUTS
COUNTER DATA
BINARY OUTPUTS
ANALOG OUTPUTS
DNP DATA
FLOAT OUTPUTS
FROZEN DATA FROZEN COUNTER DATA
BINARY INPUTS
ANALOG INPUTS
LAST VALUE DATA
FLOAT INPUTS
BINARY INPUT EVENTS
ANALOG INPUT EVENTS
EVENT DATA
FLOAT INPUT EVENTS