ProSoft Technology MVI71-DNP - Manual (Page 98)

MVI71-DNP ♦ PLC Platform Reference
DNP 3.0 Master/Slave Communication Module
Page 98 of 172 ProSoft Technology, Inc.
August 23, 2007
The following illustration shows the interaction of the counter points with the
databases.
The DNP database consists of data from the PLC and the IED units. The IED
database contains only data acquired from IED units. You can use this data in
the PLC's ladder logic. When the DNP slave port receives a counter freeze
command, the current counter values are passed to the frozen counter database.
If the DNP slave port receives a counter freeze with reset command, the current
counter values will be passed to the frozen counter database and only the values
in the DNP counter database will be set to 0.