H-14 Distributed Network Protocol (DNP) V3.00 Date Code 20001006
SEL-351 Instruction Manual
If the DNP command is issued without parameters, the relay displays both the analog and binary
maps, which have the following format:
==>DNP<STX>
Analogs = 112 28 17 35 1 56 57 58 59 60 61 62 63 64 65 \
66 67 100 101 102 103
Binaries = Default Map<ETX>
==>
If the DNP command is issued with an S parameter, the relay displays only the analog map;
likewise, a T causes the relay to display only the binary map. If the map checksum is determined
to be invalid, the map will be reported as corrupted during a display command, as follows:
==>DNP T<STX>
Binaries = Map Corrupted<ETX>
==>
If the map is determined to be corrupted, DNP will respond to all master data requests with an
unknown point error. If the DNP command is issued with an A or B parameter at level 2 or
greater, the relay requests the user enter indices for the corresponding list, where a parameter of A
specifies the Analog list and B specifies the Binary list. The relay accepts lines of indices until a
line without a final continuation character (\) is entered. Each line of input is constrained to 80
characters, but all the points may be re-mapped, using multiple lines with continuation characters
(\) at the end of the intermediate lines. If a single blank line is entered as the first line, the re-
mapping is disabled for that type (i.e., the relay uses the default analog or binary map). For
example, the first example remap could be produced with the following commands:
==>DNP A
Enter the new DNP Analog map
112 28 17 \<CR>
35 1 56 57 58 59 60 61 62 63 64 65 66 67 100 101 102 \<CR>
103<CR>
Save Changes (Y/N)? Y<CR>
==>DNP B
Enter the new DNP Binary map
<CR>
Save Changes (Y/N)? Y<CR>
==>
OTHER VERSIONS
The delta-connected PTs version of the SEL-351 Connectorized relay varies slightly from this
specification in that it has a different data map. Several points in the wye version do not exist in
the delta (per-phase power, energies, etc.). In order to maintain data continuity within a relay, the
indices for the points following the removed points are adjusted to close any gaps. These changes
do not affect the functionality of any of the common points between the two versions, just the point
indices. The following is the default object map supported by the SEL-351 Connectorized delta-
connected PTs (see Table 1.1, Table 9.3, and Appendix A).
Courtesy of NationalSwitchgear.com
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