Schweitzer Engineering SEL-387-0, Instruction Manual

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G.13
Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Distributed Network Protocol
DNP3 Documentation
the Sequential Events Recorder (SER) and carry the time stamp of actual
occurrence. Add 800 to the Binary Input Point column to get the point
mapping for points 800–1599. Static reads from these inputs will show the
same data as a read from the corresponding index in the 0–799 group. Only
points that are actually in the SER list (SET R) will generate events in the
800–1599 group.
Analog Inputs (objects 30 and 32) are supported as defined by the preceding
table. The values are reported in primary units. Current magnitudes are scaled
according to the DECPLA setting. If DECPLA is 3, then its value is
multiplied by 1000. VDC is not scaled. Event-class messages are generated
whenever an input changes beyond the value given by the ANADBA setting.
The dead-band check is done after any scaling is applied. The angles will only
generate an event if, in addition to their dead-band check, the corresponding
magnitude (the preceding point) contains a value greater than the value given
by the ANADBA setting. Analog inputs are scanned at approximately a ½-
second rate, except for analogs 201–218. During a scan, all events generated
will use the time the scan was initiated. Analogs 201–218 are derived from the
history queue data for the most recently read fault and do not generate event
messages. Analog 201 is defined as follows:
If Analog 201 is 0, fault information has not been read and the related analogs
(202–218) do not contain valid data.
The SEL-387 has the DNP event buffer capacities as follows:
Analogs 219–242 are temperature values in F or C in the SEL-387-5 and
SEL-387-6 Relays, depending on TMPREFA and TMPREFB settings. The
valid values can be in the range of 0–250° C (32–482° F). The invalid values
will be set as:
Value Event Cause
1 Trigger command
2 Pulse command
4 ER element
8 Trip 5
16 Trip 4
32 Trip 3
64 Trip 2
128 Trip 1
Value Maximum Number of Events
Binary 512
Counters 128
Analog 128
RTD Failure Mode Error Code
Open (Temp < –50°C) 7FFFh
Short (Temp > 250°C) 8000h
Fiber-Optic Communications Failure 7FFCh
External RTD Unit Status Failure 7FF8h
RTD Channel Not Used 7FF0h