Schweitzer Engineering SEL-387-0, Instruction Manual

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7.19
Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Serial Port Communications and Commands
SEL ASCII Protocol Details
HIS (History of Events)
Access Levels 1, B, 2
The HISTORY command displays the 80 most recent event summaries in
reverse chronological order (most recent event at the top, with lowest event
number
#
). The number of full Event Reports completely saved in Flash
memory depends on the SET G setting LER as follows:
Each summary shows the date, time, event type, active setting group at the
time of the event, and relay targets.
Event types, in decreasing order of precedence, are: TRIP n ( n = 1 to 5),
CLS m ( m = 1 to 4), ER (SEL
OGIC
control equation event trigger), PULSE
(user-initiated momentary contact operation), and TRIG (user-initiated
triggering of an Event Report). If more than one event type occurs during the
same event, the type with highest precedence will be displayed in the EVENT
field of each line of the display.
Enter HIS n , where n is a positive number (1 through 80), to limit the history
report to the most recent n events. The history is stored in nonvolatile memory,
so it is retained through power failures.
The date and time is saved to the nearest millisecond and referenced to the
trigger row of data in the Event Report.
An example of the display appears below. In this example, seven events have
occurred since the history was last cleared:
=> HIS <Enter>
XFMR 1 Date: 6/1/96 Time: 01:16:24
STATION A
# DATE TIME EVENT GRP TARGETS
1 01/06/96 00:18:10.333 TRIP1 1
2 01/04/96 09:08:20.058 TRIG 1
3 01/04/96 08:53:55.429 TRIP3 1 50 A B W3
4 01/01/96 00:18:10.258 TRIP1 1
5 01/01/96 00:18:08.095 TRIP3 1 50 A B W3
6 12/09/95 22:41:33.108 ER 1
7 12/09/95 22:27:47.870 TRIP3 1 50 A B W3
=>
If an event has not occurred since the history was last cleared, the headings are
displayed with the message:
History Buffer Empty
.
HIS C (Clear History and Events)
Access Levels 1, B, 2
HIS C command clears the history and events associated with them from
nonvolatile Flash memory. The clearing process can take up to 30 seconds
under normal operation. It can be even longer if the relay is busy processing a
LER Setting Number of Event Reports Stored
15 cycles 18–21
30 cycles 12–14
60 cycles 7
NOTE:
SEL-387-0 firmware versions
R100–R105 display 99 event
summaries. SEL-387-6 firmware
versions R304 and R405 display 40
event summaries. All other firmware
versions display 80 event summaries.
NOTE:
SEL-387-0 firmware versions
R100–R105 display 99 event
summaries. SEL-387-6 firmware
versions R304 and R405 display 40
event summaries. All other firmware
versions display 80 event summaries.
NOTE:
Clear the Event Buffer With
Care. Automated clearing of the event
buffer should be limited to reduce the
possibility of wearing out the
nonvolatile memory. Limit automated
HIS C commands to once per week or
less.