ProSoft Technology MVI46-DNP - Manual (Page 62)

MVI46-DNP ♦ SLC Platform Reference
Master/Slave Communication Module
Page 62 of 143 ProSoft Technology, Inc.
August 23, 2007
Mode DNP Feature Discussion
Master Will the module use the
DNP Master port? The module can be configured as a DNP master unit to interface with DNP
slave (IED) units. This feature requires configuration of the communication
characteristics for each slave and the definition of a command list. The
command list polls the slave units and to map the data from the IED units to
the databases contained in the module.
Master &
Slave What will be the memory
mapping for the DNP
and IED memory areas? There are many databases maintained within the module for all the specific
DNP data types and for the virtual master and slave unit simulated in the
module. For successful application of the module, an understanding of the
databases is required to carefully design them.
Slave Will the secondary DNP
port have a dial-up
modem attached? The secondary DNP slave port on the module can be configured to have a
dial-up modem attached. Use of this feature requires bit 2 be set in the
configuration word. Additionally, many aspects of the modem timing features
must also be configured.
Data Requirements
This design phase defines what data elements are to be interfaced in the SLC
with the DNP master and slave. The module provides the following data types:
ƒ
digital input and output
ƒ counter
ƒ analog input and output
ƒ Floating-Point
All communications between the DNP master and the SLC is through these data
types. Therefore, all data to be used by the system must be contained and
configured in one of these data types.
The following illustration shows the databases maintained by the module for the
DNP and IED data.
DNP DATA BINARY INPUTS PLC DATA
IED DATA
BINARY OUTPUTS PLC DATA
IED DATA
COUNTER DATA PLC DATA
IED DATA
ANALOG INPUTS PLC DATA
IED DATA
ANALOG OUTPUTS PLC DATA
IED DATA
FLOAT INPUTS PLC Data
FROZEN COUNTER DATA
BINARY INPUT EVENTS
ANALOG INPUT EVENTS
FLOAT INPUT EVENTS