16.19
Date Code 20171006 Instruction Manual SEL-400 Series Relays
DNP3 Communication
DNP3 Documentation
Device Attributes (Object 0)
Table 16.8 includes the supported Object 0 device attributes and variations. In
response to Object 0 requests, the relay will send attributes that apply to that par-
ticular DNP3 session. Because the relay supports custom DNP3 maps, these val-
ues will likely be different for each session.
The relay uses its internal settings for the following variations:
➤ Variation 245—SID Global setting
➤ Variation 246—DNPID port setting
➤ Variation 247—RID Global setting
Binary Inputs
Binary inputs (Objects 1 and 2) are supported as defined by Table 16.8. The
default variation for both static and event inputs is 2. Only the Read function
code (1) is allowed with these objects. The relay will respond to an Object 2,
Variation 3 request, but the response will contain no data.
The relay scans binary inputs approximately twice per second to generate DNP3
change events. When time is reported with these event objects, it is the time at
which the scanner observed the bit change. This may be significantly delayed
from when the original source changed and should not be used for sequence-of-
events determination. Binary inputs registered with SER are derived from the
SER process and carry the time stamp of actual occurrence. Some additional
binary inputs are available to DNP3, most without SER time stamps. For exam-
ple, RLYDIS is derived from the relay status variable, STWARN and STFAIL are
derived from the diagnostic task data, and UNRDEV and NUNREV are derived
from the event queue. Another binary input, STSET, is derived from the SER and
carries the time stamp of actual occurrence.
10, 12 RSTDNPE Reset (clear) DNP3 event summary AIs
d
10, 12 NXTEVE Load next fault event into DNP3 event summary AIs
Binary Counters
20, 22 ACTGRP Active settings group
NOTE: Additional binary counters are relay specific. See the relay instruction manual to see what counter objects are available.
Analog Inputs
NOTE: The analog inputs available is relay dependent. See the relay instruction manual to determine what analog inputs are available.
Analog Outputs
40, 41 ACTGRP0 Active settings group
40, 41 TECORR
e
Time-error preload value
40, 41 RA001–RA256 Remote analogs
a
The number of remote bits available,
nn
, depends on the specific relay. See the relay instruction manual to see how many are available.
b
The number of breakers to control and their designations,
m
, depends on the specific relay. See the relay instruction manual to determine
which breakers are available.
c
The number of disconnect controls,
dd
, available depends on the relay. See the relay instruction manual to determine how many disconnects
are supported. Not all SEL-400 series relays support disconnect controls.
d
Not all SEL-400 series relays support all of these resets. See the relay instruction manual to see which specific controls are available.
e
In milliseconds, –30000 time 30000. Relay Word bit PLDTE asserts for approximately 1.5 cycles after this value is written.
Table 16.9 Relay DNP3 Reference Data Map (Sheet 2 of 2)
Object Label Description
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