Date Code 20110408 Instruction Manual SEL-551 Relay
Section 7
Standard Event Reports and SER
Overview
The SEL-551 Relay has two styles of event reports:
➤ Standard 15-cycle event reports
➤ Sequential events recorder (SER) event report
These event reports contain date, time, current, relay element, optoisolated
input, and output contact information.
Standard 15-cycle event reports are generated (triggered) by fixed and
programmable conditions. These reports show information for 15 continuous
cycles. The latest 20 standard 15-cycle event reports are stored in nonvolatile
memory. If more than 20 events are triggered, the latest event report will
overwrite the oldest event report, and the oldest event report will be lost. See
Figure 7.2 for an example standard 15-cycle event report.
Lines in the sequential events recorder (SER) event report are generated
(triggered) by programmable conditions only. This report lists date and time-
stamped lines of information each time a programmed condition changes
state. The latest 512 lines of the SER event report are stored in nonvolatile
memory. If the report fills up, newer rows will overwrite the oldest rows in the
report. See Figure 7.5 for an example SER event report.
Standard 15-Cycle Event Reports
See Figure 7.2 for an example standard 15-cycle event report.
Standard Event
Report Triggering
The relay triggers (generates) a standard 15-cycle event report when any of the
following occur:
➤ Relay Word bit TRIP asserts
➤ Programmable SELOGIC
®
control equations setting ER1
asserts to logical 1
➤ Programmable SELOGIC control equations setting ER2 asserts
to logical 1
➤ TRIGGER serial port command executed
➤ PULSE serial port command for output contact OUT1, OUT2,
OUT3, or OUT4 executed
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