7.42
SEL-787 Relay Instruction Manual Date Code 20150130
Communications
SEL ASCII Protocol and Commands
TARGET Command (Display Relay Word Bit Status)
The TAR command (see Table 7.50 and Table 7.51) displays the status of
front-panel target LEDs or Relay Word bit, whether these LEDs or Relay
Word bits are asserted or deasserted.
The elements are represented as Relay Word bits and are listed in rows of
eight, called Relay Word rows. The first four rows, representing the
front-panel operation and target LEDs, correspond to Table 7.52. All Relay
Word rows are described in Table J.1 and Table J.2.
Relay Word bits are used in SEL
OGIC control equations. See Appendix J:
Relay Word Bits.
The TAR command does not remap the front-panel target LEDs, as is done in
some previous SEL relays.
TFE Command (Through-Fault Event Report)
The TFE command displays the following data for each individually recorded
through-fault event:
➤ Date and time of the through fault
➤ Duration (seconds) of the through fault
➤ Maximum current (Amps primary) for each monitored current
input
The following cumulative values (updated for each new through-fault event)
are also displayed:
➤ Through-fault count
➤ Total accumulated percentage of through-fault capability used
up per phase
Table 7.50 TARGET Command (Display Relay Word Bit Status)
Command Description Access Level
TAR name k TAR n
TAR n k
Use TAR without parameters to display
Relay Word Row 0 or last displayed target row.
1
TAR R Clears front-panel tripping targets. Unlatches
the trip logic for testing purposes (see
Figure 8.1). Shows Relay Word Row 0.
1
Table 7.51 TARGET Command Format
Parameter Description
name Display the Relay Word row with Relay Word bit name.
n Show Relay Word row number n.
k Repeat k times (1–32767)
NOTE: The TARGET R command
cannot reset the latched targets if a
TRIP condition is present.
Table 7.52 Front-Panel LEDs and the TAR 0 Command
LEDs 7 6 5 4 3 2 1 0
TAR 0 ENABLED TRIP_LED TLED_01 TLED_02 TLED_03 TLED_04 TLED_05 TLED_06
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