Date Code 20001006 Distributed Network Protocol (DNP) V3.00 H-13
SEL-351 Instruction Manual
Index Close (0x4X) Trip (0x8X) Latch On (3) Latch Off (4) Pulse On (1) Pulse Off (2)
0-7 Set Clear Set Clear Pulse Clear
8-15 Pulse Do nothing Pulse Do nothing Pulse Do nothing
16 Pulse RB2 Pulse RB1 Pulse RB2 Pulse RB1 Pulse RB2 Pulse RB1
17 Pulse RB4 Pulse RB3 Pulse RB4 Pulse RB3 Pulse RB4 Pulse RB3
18 Pulse RB6 Pulse RB5 Pulse RB6 Pulse RB5 Pulse RB6 Pulse RB5
19 Pulse RB8 Pulse RB7 Pulse RB8 Pulse RB7 Pulse RB8 Pulse RB7
20 Pulse CC Pulse OC Pulse CC Pulse OC Pulse CC Pulse OC
The Status field is used exactly as defined. All other fields are ignored. A pulse operation asserts
a point for a single processing interval. Caution should be exercised with multiple remote bit
pulses in a single message (i.e., point count > 1), as this may result in some of the pulse commands
being ignored and returning an already active status.
Analog Outputs (objects 40 and 41) are supported as defined by the preceding table. Flags
returned with object 40 responses are always set to 0. The Control Status field of object 41
requests are ignored. If the value written to index 0 is outside of the range 1 through 6, the relay
will not accept the value and will return a hardware error status.
Relay Summary Event Data
Whenever there is unread relay event summary data (fault data), binary input point 1023 will be
set. In order to load the next available relay event summary, the master should pulse binary output
point 15. This will cause the event summary analogs (points 105 - 113) to be loaded with
information from next oldest relay event summary. Since the summary data is stored in a first in,
first out manner, loading the next event will cause the data from the previous load to be discarded.
The event summary analogs will retain this information until the next event is loaded. If no further
event summaries are available, attempting to load the next event will cause the event type analog
(point 105) to be set to 0.
POINT REMAPPING
The analog and binary input points (objects 1, 2, 30, and 32) may be remapped via the DNP
command. The map is composed of 2 lists of indices, one for the analogs (30 and 32) and the
other for the binaries (1 and 2). The indices correspond to those given by the relay’s default DNP
data map. The order they occur in the list determines the index that the corresponding value is
reported as to the DNP master. If a value is not in the list, it is not available to the DNP master.
All 1025 binaries and 114 analogs may be included in the list, but may occur only once. The maps
are stored in nonvolatile memory. The DNP command is only available if DNP has been selected
on one of the ports. The DNP command has the following format:
DNP [type]
where type may be A, B, S, T, or omitted.
Courtesy of NationalSwitchgear.com
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