R.6.38
SEL-421 Relay Reference Manual Date Code 20111215
DNP3 Communications
DNP LAN/WAN in the SEL-421
Custom Data Mapping
Installing an Ethernet card with DNP3 LAN/WAN into an SEL-421 adds the
ability to make relay data available over Ethernet to a properly configured
DNP3 Master. However, by default, DNPMAP = AUTO, which includes only
the relay Digital and Analog Outputs. If Digital or Analog Inputs or Counters
need to be available to DNP3, each point must be specified in a custom data
map. Setting DNPMAP = CUSTOM enables you to specify the DNP3 data
points available for up to 10 unique master sessions using any of 5 distinct
DNP3 data maps.
The SEL-421 relay’s DNP LAN/WAN interface also maps incoming control
points either to remote bits within the relay or to internal command bits that
cause circuit breaker operations. Please see Table 6.25 for a list of control
points and control methods available in the SEL-421.
When the Ethernet port has been configured to use custom DNP3 maps, the
SEL-421 will obtain these maps from the Ethernet card Settings subdirectory.
Custom setting files have the filename SET_DNPx.TXT, where x is the map
number from 1 to 5.
The settings described in Table 6.21 below are used to define the custom
DNP3 maps. Please note that these settings are only accessible as files in the
SETTINGS/CARD subdirectory. The best way to operate on these settings is
by using the
ACSELERATOR QuickSet settings assistant.
NUMEVE Number of Events
to Transmit On (1 -
200)
1–200 10
AGEEVE Age of Oldest Event
to Transmit On (0–
100000 sec)
0–100000 2
ETIMEO Event Message
Confirm Timeout
(1–50 sec)
1–50 2
URETRY Unsolicited
Message Max Retry
Attempts (2–10)
2–10 3
UTIMEO Unsolicited
Message Offline
Timeout (1–5000
sec)
1–5000 60
Table 6.20 SEL-421 Ethernet Port DNP3 Protocol Settings (Sheet 4 of 4)
Name Description Range Default
Table 6.21 SEL-421 DNP LAN/WAN Map Settings (Sheet 1 of 2)
Name Typ e Range Default Description
BIM0000–
BIM1023
Binary Input
Point
String of form “1:addr:bit” where
addr must be in range 0–65534 and
bit must be in range 0–15.
“” These settings correlate specific database bits
with binary input indexes.
BIC0000–
BIC1023
Binary Input
Class
DFLT, 0–3 DFLT These settings specify the event class for that
index. A value of DFLT indicates to use the
ECLASSB setting, 0 indicates to not generate
events, and 1–3 provide the specific class to
place the point events into.
BOM0000–
BOM0511
Binary
Output Point
OFF, 0–(MAX as defined by
Table 6.2 5)
OFF These settings correlate specific control
operations from Table 6.25 to binary output
indexes. A value of OFF indicates no object at
that index.
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