ProSoft Technology MVI69-GSC - Manual (Page 75)

MVI69-GSC ♦ CompactLogix or MicroLogix Platform Reference
Generic ASCII Serial Communication Module User Manual
ProSoft Technology, Inc. Page 75 of 102
September 24, 2010
The following illustration shows the data transfer method used to move data
between the CompactLogix processor, the MVI69-GSC module and the 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 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
database. The following illustration shows the layout of the database:
Module’s Internal Database Structure
5000 registers for user data 0
Register Data
4999
3000 words of configuration and
status data
5000
Status and Config
7999