7-20
Serial Port Communications and Commands
Date Code 20020129
SEL-387E Instruction Manual
=>>HIS<ENTER>
XFMR 1 Date: MM/DD/YY Time: HH:MM:SS.SSS
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 50/51 A B W3
4 01/01/96 00:18:10.258 TRIP1 1
5 01/01/96 00:18:08.095 TRIP3 1 50/51 A B W3
6 12/09/95 22:41:33.108 ER 1
7 12/09/95 22:27:47.870 TRIP3 1 50/51 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
The
HIS C
command clears the history and associated events from nonvolatile Flash memory.
The clearing process may take up to 30 seconds under normal operation. It may be even longer
if the relay is busy processing a fault or other protection logic. The following is an example of
the
HIS C
command. The relay will pause after the word “Clearing” until the buffer is
completely clear, and then it will display the rest of the information.
=>>HIS C<ENTER>
Clear History Buffer
Are you sure (Y/N) ? Y<ENTER>
Clearing
Complete
Relay pauses after the word Clearing
=>>
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.
INI (Initialize Interface Board)
Access Levels 1, B, 2
The
INI
command reports the number and type of interface boards in the relay from Access
Levels 1 and B. If the number or type of interface boards has changed since last power up, INI
will confirm from Access Level 2 that the interface boards present are correct.
