Sel 551 - Making SER Event Report Trigger Settings; Retrieving SER Event Report Rows

7.9
Date Code 20110408 Instruction Manual SEL-551 Relay
Standard Event Reports and SER
Sequential Events Recorder (SER) Event Report
The elements are Relay Word bits from Table 4 .5. Each element is looked at
individually to see if it asserts or deasserts. Any assertion or deassertion of a
listed element triggers a row in the SER event report. For example, setting
SER1 contains:
➤ time-overcurrent element pickups (51P1 and 51G1)
➤ time-overcurrent element (timed out; 51P1T and 51G1T)
➤ instantaneous overcurrent elements (50P1 and 50P2)
Thus, any time one of these overcurrent elements picks up, times out, or drops
out, a row is triggered in the SER event report.
The other two SER factory settings (SER2 and SER3) trigger rows in the SER
event report for such things as optoisolated input (
IN1), output contact (OUT1,
OUT2, or OUT3), lockout state (79LO), and breaker failure (SV5T) operation,
among other things.
Also, if the relay is newly powered up or a settings change is made, a row is
triggered in the SER event report with the message:
Relay newly powered up or settings changed
Each row in the SER event report contains date, time, current, relay element,
optoisolated input, and output contact information.
Making SER Event
Report Trigger
Settings
Each SER trigger setting (SER1, SER2, or SER3) can be set with up to 24
elements (Relay Word bits from Table 4.5 or Table 4.6). Thus, up to 72
elements can be monitored altogether for SER event report row triggering.
The SER settings can be made using spaces or commas as delimiters between
elements. For example, if setting SER1 is made as follows:
SER1 = 51P1,51G1 51P1T,,51G1T , 50P1, , 50P2
The setting displays as:
SER1 = 51P1 51G1 51P1T 51G1T 50P1 50P2
Retrieving SER Event
Report Rows
The latest 512 rows of the SER event report are stored in nonvolatile memory.
Row 1 is the most recently triggered row, and row 512 is the oldest. These
lines are accessed with the SER command in the different ways described in
Table 7.5.
Table 7.5 SER Report Row Commands and Format (Sheet 1 of 2)
Example SER
Serial Port Commands
Format
SER If SER is entered with no numbers following it, all available rows are displayed (up to row number 256).
They display with the oldest row at the beginning (top) of the report and the latest row (row 1) at the end
(bottom) of the report. Chronological progression through the report is down the page and in descending
row number.
SER 17 If SER is entered with a single number following it (17 in this example), the first 17 rows are displayed,
if they exist. They display with the oldest row (row 17) at the beginning (top) of the report and the latest
row (row 1) at the end (bottom) of the report. Chronological progression through the report is down the
page and in descending row number.