Sel 551 - Page 131

5.13
Date Code 20110408 Instruction Manual SEL-551 Relay
Serial Port Communications and Commands
Command Explanations
The above two examples demonstrate how to go from Access Level 0 to
Access Level 1. The procedure to go from Access Level 1 to Access Level 2 is
much the same, with command 2AC entered at computer screen prompt
=>.
The relay closes the ALARM contact for one second after a successful Level 2 or
Level C access. If access is denied, the ALARM contact also pulses.
Depending on the status of the main board password jumper, an Access Level
2 password may have to be entered, too (
Password: ?). The relay is shipped
with the default Access Level 2 password shown in the table under the PAS
Command (Password) on page 5.23. Computer screen prompt
=>> indicates
that the relay has gained Access Level 2.
Access Level 1
Commands
DAT Command (Date)
DAT displays the date stored by the internal calendar/clock. If the date format
setting DATE_F is set to MDY, the date is displayed as month/day/year. If the
date format setting DATE_F is set to YMD, the date is displayed as year/
month/day.
To set the date, type DATE mm/dd/yy <Enter> if the DATE_F setting is
MDY. If the DATE_F is set to YMD, enter DATE yy/mm/dd <Enter>. To set
the date to June 1, 1996, enter:
=>DATE 6/1/96 <Enter>
6/1/96
=>
You can separate the month, day, and year parameters with spaces, commas,
slashes, colons, and semicolons.
EVE Command (Event)
Use the EVE command to view 15-cycle event reports. See Section 7:
Standard Event Reports and SER for further details on retrieving event
reports.
HIS Command (History)
HIS [X] displays the summary of the latest 20 events or allows you to clear the
history buffer, which contains the latest 20 events in nonvolatile memory.
If no parameters are specified in the HIS command, the relay displays the 20
most recent events in reverse chronological order.
If X is a number (1–20), the relay displays the X most recent events.
If X is C or c, the relay clears the history buffer and all corresponding event
reports in nonvolatile memory.
The history report includes: the date and time the event was triggered, the type
of event, the recloser shot counter, the maximum phase current in the event,
and the front-panel fault type targets if the event was a TRIP type of event. For
more information on events and event reports, see Section 7: Standard Event
Reports and SER.