10-18 Serial Port Communications and Commands Date Code 20001006
SEL-351 Instruction Manual
HIS Command (Event Summaries/History)
HIS x displays event summaries or allows you to clear event summaries (and corresponding event
reports) from nonvolatile memory.
If no parameters are specified with the HIS command:
=HIS <ENTER>
the relay displays the most recent event summaries in reverse chronological order.
If x is a number (1 to 30; see Table 12.1):
=HIS 6 <ENTER>
the relay displays the x most recent event summaries. The maximum number of available event
summaries is a function of the LER (length of event report) setting and the features present in the
relay firmware.
If x is “C” or “c”, the relay clears the event summaries and all corresponding event reports from
nonvolatile memory.
The event summaries include the date and time the event was triggered, the type of event, the fault
location, the maximum phase current in the event, the power system frequency, the number of the
active setting group, the reclose shot count, and the front-panel targets.
To display the relay event summaries, enter the following command:
=>HIS <ENTER>HIS <ENTER>
FEEDER 1 Date: 02/01/97 Time: 08:40:16.740
STATION A
# DATE TIME EVENT LOCAT CURR FREQ GRP SHOT TARGETS
1 02/01/97 08:33:00.365 TRIG $$$$$$$ 1 60.00 3 2
2 01/31/97 20:32:58.361 ER $$$$$$$ 231 60.00 2 2
3 01/29/97 07:30:11.055 AG T 9.65 2279 60.00 3 2 INST 50
=>
The fault locator has influence over information in the EVENT and LOCAT columns. If the fault
locator is enabled (enable setting EFLOC = Y), the fault locator will attempt to run if the event
report is generated by a trip (assertion of TRIP Relay Word bit) or other programmable event
report trigger condition (SELOGIC
®
Control Equation setting ER).
Courtesy of NationalSwitchgear.com
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