ProSoft Technology MVI46-DNP - Manual (Page 68)

MVI46-DNP ♦ SLC Platform Reference
Master/Slave Communication Module
Page 68 of 143 ProSoft Technology, Inc.
August 23, 2007
The remote DNP master unit can read the current status data and the event data
from the module. Event messages generated by the module can be retrieved
using a poll for Class 2 data, as all digital input events are considered a Class 2
data type. If unsolicited message generation is enabled in the application, the
module automatically sends the events to the DNP master unit when the
maximum event count for Class 2 data is reached, or when the timeout for
unsolicited messages is exceeded. The following shows a data flow diagram for
the digital input data:
All data associated with the digital inputs is transferred from the SLC to the
module in M1: file data area 0 to 127. This provides for a maximum number of
2048 points.