ProSoft Technology MVI46-DNP - Manual (Page 69)

Reference MVI46-DNP ♦ SLC Platform
Master/Slave Communication Module
ProSoft Technology, Inc. Page 69 of 143
August 23, 2007
DNP Digital Output Data
This data type stores digital control and command state data received from the
DNP master unit with a value of 1 or 0. The size of this data area is determined
from the configuration parameter Number of Binary Output Points. The area is
partitioned into two separate areas. The first area is the DNP binary output data
for the SLC, and the second is the DNP binary output data for the IED units. The
configuration parameter, Number of Binary Output Points for SLC, determines
the size of the SLC's data area. The remaining portion is defined as the IED
binary output data area. IED units can use any portion of the DNP binary output
data area. The command list instructions are not limited to the IED data area.
SLC data are transferred from the module to the SLC using the COP command
from the M1: file. Therefore, these data are read-only for the SLC, as the SLC
cannot directly alter these values in the module. It is the responsibility of the DNP
master unit to maintain this data. For example, if the DNP master sets a digital
point to the ON state, it remains ON until the master resets the point. The
following shows a data flow diagram for the digital output data:
All data associated with the digital outputs is transferred from the module to the
SLC in the module's M1: file data area 512 to 639. This provides for a maximum
number of 2048 points.