ProSoft Technology MVI69-103M - Manual (Page 79)

Reference MVI69-103M ♦ CompactLogix or MicroLogix Platform
IEC 60870-5-103 Master Communication Module
ProSoft Technology, Inc. Page 79 of 131
November 3, 2008
The following example shows a typical backplane communication application.
Assume that the backplane parameters are configured as follows:
Read Register Start: 0
Read Register Count: 480
Write Register Start: 480
Write Register Count: 480
The backplane communication would be configured as follows:
Database address 0 to 479 will be continuously transferred from the module to
the processor. Database address 480 to 959 will continuously be transferred
from the processor to the module.
The Block Transfer Size parameter basically configures how the Read Data and
Write Data areas are broken down into data blocks (60, 120, or 240).
If Block Transfer Size = 60: