R.6.25
Date Code 20111215 Reference Manual SEL-421 Relay
DNP3 Communications
DNP3 Documentation
The SEL-421 assigns some special operations to the code portion of the
control relay output block command. The special operations are shown in
Tab le 6.16. Pulse operations provide a pulse duration of one protection-
processing interval.
Tabl e 6 . 15 SEL -421 Object 12 Trip/Close Pair Operation
Indices Close Trip
0–15 Set remote bits RB1–RB16 Clear remote bits RB1–RB16
16 Open Circuit Breaker 1 No action
17 Close Circuit Breaker 1 No action
18 Open Circuit Breaker 2 No action
19 Close Circuit Breaker 2 No action
20–23 Reserved Reserved
24 Pulse RB2 Pulse RB1
25 Pulse RB4 Pulse RB3
26 Pulse RB6 Pulse RB5
27 Pulse RB8 Pulse RB7
28 Pulse RB10 Pulse RB9
29 Pulse RB12 Pulse RB11
30 Pulse RB14 Pulse RB13
31 Pulse RB16 Pulse RB15
32 Pulse CC1, Circuit Breaker 1
close command bit
Pulse OC1, Circuit Breaker 1 open
command bit
33 Pulse CC2, Circuit Breaker 2
close command bit
Pulse OC2, Circuit Breaker 2 open
command bit
34–35 Reserved Reserved
36 Reset demands Reset demands
37 Reset demand peaks Reset demand peaks
38 Reset energy metering Reset energy metering
39 Reset breaker monitor Reset breaker monitor
40 Reset front panel targets Reset front panel targets
41 Read next relay event Read next relay event
42 Reset min/max metering Reset min/max metering
43 Reserved Reserved
44–59 Set remote bits RB17–RB32 Clear remote bits RB17–RB32
60 Pulse RB18 Pulse RB17
61 Pulse RB20 Pulse RB19
62 Pulse RB22 Pulse RB21
63 Pulse RB24 Pulse RB23
64 Pulse RB26 Pulse RB25
65 Pulse RB28 Pulse RB27
66 Pulse RB30 Pulse RB29
67 Pulse RB32 Pulse RB31