ProSoft Technology MVI46-DNP - Manual (Page 73)

Reference MVI46-DNP ♦ SLC Platform
Master/Slave Communication Module
ProSoft Technology, Inc. Page 73 of 143
August 23, 2007
The DNP master unit can read the current value data and the event data from the
module. Event messages generated by the module can be retrieved using a poll
for Class 3 data, as all analog input events are considered a Class 3 data type. If
unsolicited message generation is enabled in the application, the events are
automatically sent by the module to the DNP master unit when the maximum
event count for Class 3 data is reached or when the timeout for unsolicited
messages is exceeded. The following shows a data flow diagram for the analog
input data:
All data associated with the analog inputs is transferred from the SLC to the
module in M1: file elements 128 to 383. This provides for a maximum number of
256 points.