7.53
Date Code 20170927 Instruction Manual SEL-751 Relay
Communications
Communications Protocols
SUMMARY Command
The SUM command (see Table 7.46) displays an event summary in a readable
format.
Each event summary report shows the date, time, current magnitudes (primary
values), frequency, and, if the relay has the voltage option, voltage magnitudes
(primary values). The relay reports the voltage and current when the largest
current occurs during the event. The event summary report also shows the
event type (e.g., A-phase 51 Trip).
SUMMARY HIF Command
Use the SUM HIF command (see Table 7.47) to view the HIF event summary
reports in the relay memory. This command is only available when the relay
supports HIF detection.
TARGET Command (Display Relay Word Bit Status)
The TAR command (see Table 7.48) displays the status of front-panel target
LEDs or Relay Word bit, whether these LEDs or Relay Word bits are asserted
or deasserted.
Table 7.46 SUMMARY Command
Command Description Access Level
SUM n Displays the latest event summary. Use n to display
particular event summary.
1
SUM C or R Clears the archive. 1
Table 7.47 SUM HIF Command
Command Description Access Level
SUM HIF Returns the most recent HIF event summary. 1
SUM HIF n Returns an event summary for HIF event n.1
Parameter
n Indicates the record number; see the HIS HIF Command (HIF event
history report).
Table 7.48 TARGET Command (Display Relay Word Bit Status)
Command Description Access Level
TAR name k
TAR n
TAR n k
Displays Relay Word Row 0 or the last displayed
target row when used without parameters.
1
TAR R Clears the front-panel tripping targets. Unlatches
the trip logic for testing purposes (see Figure 8.2).
Shows Relay Word Row 0.
1
Parameter
name Displays the Relay Word row with Relay Word bit name.
n Shows Relay Word row number n.
k Repeats k times (1–32767).
NOTE: The TARGET R command
cannot reset the latched targets if a
TRIP condition is present.
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