16.23
Date Code 20171006 Instruction Manual SEL-400 Series Relays
DNP3 Communication
DNP3 Documentation
Analog Outputs
Analog outputs (Objects 40 and 41) are supported as defined by Table 16.8. The
default variation for both static and event inputs is Variation 2. If an invalid value
is written, the relay will ignore the value without generating an error.
The relay will only honor the first ten points in a request. Any additional points in
the request will be ignored without generating an error.
Counters
Counters (Object 20 and 22) are supported as defined by Table 1 6.8. The default
variation for Object 20 is Variation 6, and Variation 2 is the default for Object 22.
Counters shall only support the Read function code (1). A Read of Object 21 will
receive a Null response. The default dead band is 0, which may be overridden by
a per-point dead band in a custom map. Scaling for counters is always 1.
Default Data Map
See Section 10: Communications Interfaces in the product-specific instruction
manual to see the relay default map. If the default maps are not appropriate, you
can also use the custom DNP3 mapping commands SET D n and SHOW D n,
where n is the map number, to edit or create the map required for your application.
Configurable Data Mapping
One of the most powerful features of the relay DNP3 implementation is the abil-
ity to remap DNP3 data and, for analog and counter inputs, specify per-point
scaling and dead bands. Remapping is the process of selecting data from the
default or reference map and organizing it into a dataset optimized for your appli-
cation. The relay uses point labels rather than point indexes in a reference map to
streamline the remapping process. This enables you to quickly create a custom
map without having to search for point indexes in a large reference map.
You may use any of the six available DNP3 maps to exchange data with any
DNP3 master. Each map is initially populated with default data points, as
described in the Default DNP3 Map. You may remap the points in a default map
to create a custom map with as many as:
➤ 400 binary inputs
➤ 100 binary outputs
➤ 20 counters
➤ 200 analog inputs
➤ 100 analog outputs
Use the settings Class D to access the relay DNP3 map settings shown in DNP3
Settings—Custom Maps on page 12.15. There are five DNP3 maps available to
customize, or leave as default.
The mapping settings are entered in a line-based freeform format. An example of
these settings is shown in Figure 16.4. You can program a custom scaling and
dead band for each point where indicated. If you do not specify a custom scaling
or dead band, the relay will use the default for the type of value you are mapping.
For example, if you enter the label 3P_F in Row 1 of the custom analog map with
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