D.22
SEL-787 Relay Instruction Manual Date Code 20150130
DNP3 Communications
DNP3 Documentation
Control Point
Operation
Use the Trip and Close, Latch On/Off and Pulse On operations with Object 12
control relay output block command messages to operate the points shown in
Table D.12. Pulse operations provide a pulse with duration of one protection
processing interval.
Analog Inputs
Analog Inputs (30) and Analog Change Events (32) are supported as defined
in Table D.11. The default variation for both static and event inputs is defined
by the DVARAI1 (DVARAIn for DNP3 LAN/WAN session n) setting. Only
the Read function code (1) is allowed with these objects.
Unless otherwise indicated, analog values are reported in primary units. See
Appendix K: Analog Quantities for a list of all available analog inputs.
For all currents, the default scaling is the DECPLA setting on magnitudes and
scale factor of 100 on angles. The default dead band for currents is ANADBV
on magnitudes and ANADBM on angles. For all voltages, the default scaling
is the DECPLV setting on magnitudes and scale factor of 100 on angles. The
default dead band for voltages is ANADBV on magnitudes and ANADBM on
angles. For all powers and energies, the default scaling is the DECPLM setting
and default dead band is ANADBM. For all other quantities, the default
scaling is 1 and default dead band is ANADBM.
Default scaling and dead bands may be overridden by per-point scaling and
dead band. See Configurable Data Mapping on page D.23 for more
information. Dead bands for analog inputs can also be modified by writing to
object 34.
A dead-band check is done after any scaling has been applied. Event class
messages are generated whenever an input changes beyond the value given by
the appropriate dead-band setting. The voltage and current phase angles will
only generate an event if, in addition to their dead-band check, the
corresponding magnitude changes beyond its own dead band. Analog inputs
are scanned at approximately a one-second rate. All events generated during a
scan will use the time the scan was initiated.
Table D.12 SEL-787 Object 12 Control Operations
Label Close/Pulse On Trip/Pulse On Nul/Latch On Nul/Latch Off Nul/Pulse On
RB01–RB32 Pulse Remote Bit
RB01–RB32
Pulse Remote Bit
RB01–RB32
Set Remote Bit
RB01–RB32
Clear Remote Bit
RB01–RB32
Pulse Remote Bit
RB01–RB32
RBxx:RByy Pulse RByy
RB01–RB32
Pulse RBxx
RB01–RB32
Not Supported Not Supported Not Supported
OC1 Open Circuit Breaker 1
(Pulse OC1)
Open Circuit Breaker 1
(Pulse OC1)
Open Circuit Breaker 1
(Pulse OC1)
No action Open Circuit Breaker 1
(Pulse OC1)
CC1 Close Circuit Breaker 1
(Pulse CC1)
Close Circuit Breaker 1
(Pulse CC1)
Close Circuit Breaker 1
(Pulse CC1)
No action Close Circuit Breaker 1
(Pulse CC1)
OC1:CC1 Close Circuit Breaker 1
(Pulse CC1)
Open Circuit Breaker 1
(Pulse OC1)
Not Supported Not Supported Not Supported
OC2 Open Circuit Breaker 2
(Pulse OC2)
Open Circuit Breaker 2
(Pulse OC2)
Open Circuit Breaker 2
(Pulse OC2)
No action Open Circuit Breaker 2
(Pulse OC2)
CC2 Close Circuit Breaker 2
(Pulse CC2)
Close Circuit Breaker 2
(Pulse CC2)
Close Circuit Breaker 2
(Pulse CC2)
No action Close Circuit Breaker 2
(Pulse CC2)
OC2:CC2 Close Circuit Breaker 2
(Pulse CC2)
Open Circuit Breaker 2
(Pulse OC2)
Not Supported Not Supported Not Supported
NOTE: Dead-band changes via
Object 34 are not stored in
nonvolatile memory. Be sure to
reissue the Object 34 dead-band
changes you want to retain after
changing DNP port settings, issuing a
STA C command, or cold-starting the
relay (power-cycle).
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