9.5
Date Code 20020903 SEL-587Z Instruction Manual
Event Reports and SER
Event Reports
The HISTORY command displays the summary of the latest 10 events or
allows the user to clear the HISTORY archive. The command format is as
follows:
HISTORY [x]
If no arguments are specified in the HISTORY command, the relay displays
the 10 most recent events in reverse chronological order.
If x is a number (0–10), the relay displays the x most recent events. If x is “C”
or “c”, the relay clears the history archive and event reports.
The format for a typical HISTORY report is shown below:
=>>HIS<Enter>
BUS 1 Date: 05/13/2002 Time: 04:10:50.905
STATION A
# DATE TIME EVENT TARGETS
1 11/07/2001 19:01:38.302 ER2
2 10/28/2001 11:10:00.982 TRIP1 87 A
3 08/14/2001 04:31:12.905 TRIP2 51 B G
4 12/31/2000 23:31:50.732 TRIG
5 06/03/2000 01:07:24.992 TRIP1 50 A B C G
If no events are contained in the history archive, the relay responds “History
Buffer Empty.”
Retrieving
Event Reports
The latest 10 event reports are stored in nonvolatile memory. Any given event
report has four different ways it can be displayed, depending on the particular
serial port command issued to the relay. The command choices are shown
below. The n parameter refers to the event report number (n = 1 through 10),
with n = 1 being the most recent event report and n = 10 being the oldest event
report.
If no numeric n parameter is entered with the serial port command, the most
recent event report (n = 1) is displayed.
If an event report is requested that does not exist, the relay responds “Invalid
Event.”
If any of the relay settings or logic changes after an event was triggered, only
the logic settings are displayed. Instead of the group settings, the relay shows
the message “RELAY SETTINGS CHANGED SINCE EVENT.”
Table 9.2 Event Report
Serial Port Command Format
EVENT n Event report with 15 cycles of the input
voltages, input currents, high-impedance
elements, overcurrent elements, inputs and outputs
with 1/4-cycle data resolution, summary report, and settings.
EVENT L n Long event report with 15 cycles of the
input voltages, input currents, high-impedance
elements, overcurrent elements, inputs and outputs
with 1/8-cycle data resolution, summary report, and settings.
EVENT L C n Same as long event with SEL-5601 digital data
in 1/8-cycle resolution appended after settings are shown.
EVENT R Displays raw (unfiltered) analog data in 1/16 cycle resolution.
EVENT R C n Same as raw event with SEL-5601 digital data in
1/8-cycle resolution appended after settings are shown.
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