R.6.16
SEL-421 Relay Reference Manual Date Code 20111215
DNP3 Communications
DNP3 Documentation
Default Data Map
Tab le 6.10 shows the SEL-421 default DNP3 data map. The default data map
makes a wide range of data in the relay available. If your DNP3 master does
Class 0 polls, polls of all present value points, the response will be quite large.
Use the custom DNP mapping functions of the SEL-421 to reduce the data
map to the points that your application requires.
The SEL-421 provides binary input information with one of two reference
maps: base or extended. The default map selection is base (MAPSEL := B).
With the base reference map, Object 1 and 2 Indices 0–799 and 800–1599
contain the same data but provide different levels of time-stamp accuracy for
associated Object 2 DNP events. The SER (sequential events recorder) in the
relay controls events for indices 800–1599. The time stamps for these indices
have the same accuracy and resolution that the SER provides. The only points
available within indices 800–1599 are those that you configure for tracking by
the relay SER. Use indices 800–1599 and corresponding SER settings to track
each change of bits in the Relay Word and provide SER quality time stamps
via DNP,. Event report for indices 0–799 uses a slower, less accurate time-
stamping mechanism, but this reporting operates for all points within the
range without additional configuration.
With the extended reference map, Object 1 and 2 Indices 16–265 contain the
points available for tracking by the relay SER. SER quality time stamps are
available for these points and only the SER settings are needed in order to
configure the points available. The entire visible Relay Word (Table A.2 on
page R.A.22–Table A.48 on page R.A.73) is available starting at Index 272.
81 1 Storage Object
82 1 Device Profile
83 1 Private Registration Object
83 2 Private Registration Object Descriptor
90 1 Application Identifier
100 1 Short Floating Point
100 2 Long Floating Point
100 3 Extended Floating Point
101 1 Small Packed Binary—Coded Decimal
101 2 Medium Packed Binary—Coded Decimal
101 3 Large Packed Binary—Coded Decimal
112 All Virtual Terminal Output Block 2 6
113 All Virtual Terminal Event Data 1, 20, 21 6 129, 130 17, 28
N/A No object required for the following function codes:
13 cold start
14 warm start
23 delay measurement
13, 14, 23
a
Supported in requests from master
b
May generate in response to master
c
Decimal
d
Hexadecimal
e
Default variation
f
Supports request, but response contains no data
Table 6.9 SEL-421 DNP Object List (Sheet 4 of 4)
Obj. Var. Description
Request
a
Response
b
Funct. Codes
c
Qual. Codes
d
Funct. Codes
c
Qual. Codes
d
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