R.6.27
Date Code 20111215 Reference Manual SEL-421 Relay
DNP3 Communications
Application Example
Application Example
Application
This example uses an SEL-421 connected to an RTU over an EIA-485
network. The RTU collects basic metering information from the relay. The
network for this example is shown in Figure 6.1.
Figure 6.1 DNP Application Network Diagram
The metering and status data that the RTU collects from the relay are listed in
Tab le 6.17.
Table 6.17 DNP3 Application Example Data Map (Sheet 1 of 2)
Name Object
Default Map
Index
Custom
Map Index
Description
EN 1, 2 7 1 Relay enabled
TRIPLED 1, 2 6 2 Circuit Breaker tripped
IN101 1, 2 1024 3 Relay Discrete Input 1
IN102 1, 2 1025 4 Relay Discrete Input 2
IN103 1, 2 1026 5 Relay Discrete Input 3
IN104 1, 2 1027 6 Relay Discrete Input 4
SALARM 1, 2 479 7 Relay software alarm
HALARM 1, 2 478 8 Relay hardware alarm
TESTDNP 1, 2 607 9 DNP test mode
enabled
RB01 10, 12 0 1 General use Control
Point 1
RB02 10, 12 1 2 General use Control
Point 2
RB03 10, 12 2 3 General use Control
Point 3
RB04 10, 12 3 4 General use Control
Point 4
RB05 10, 12 4 5 General use Control
Point 5
RB06 10, 12 5 6 General use Control
Point 5
CC1, OC1 10, 12 32 7 Circuit Breaker manual
trip/close
LIAFM
a
,
LIAFA
b
30 0, 1 1, 2 IA magnitude and
angle
LIBFM
a
,
LIBFA
b
30 2, 3 3, 4 IB magnitude and
angle
SEL-421
Network Switch
Non-DNP IED
To SCADA
RTU
...
SEL-2030
Non-DNP IED
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