Sel 2414 - Sequential Events Recorder (SER); Event Reporting; Length; Triggering

9.2
SEL-2414 Transformer Monitor Instruction Manual Date Code 20130214
Analyzing Events
Event Reporting
See the CEVENT Command (Compressed Event Report) on page 7.8 and SEL
Compressed ASCII Commands on page C.1 for further information. Compressed
ASCII Event Reports contain all of the Device Word bits.
Sequential Events
Recorder (SER)
The SER report captures detailed digital element state changes. Settings allow up
to 96 Device Word bits to be monitored, in addition to the automatically gener-
ated triggers for device power up and settings changes. State changes are time-
tagged to the nearest millisecond. SER report data are useful in commissioning
tests and during operation for system monitoring and control. SER information is
stored when state changes occur.
Event Reporting
Length
IMPORTANT NOTE: Changing the
LER setting clears all events in
memory. Be sure to save critical event
data prior to changing the LER
setting.
The SEL-2414 provides selectable event report length (LER) and prefault length
(PRE). Filtered event report length is either 15 or 64 cycles. Raw event reports
display one extra cycle of data at the beginning of the report. Prefault length is
the first part of the total event report length and precedes the event report trigger-
ing point. Prefault length is 1–10 cycles for LER = 15 and 1–59 cycles for
LER = 64.
Triggering
The SEL-2414 triggers (generates) an event report when any of the following
occur:
➤ Programmable SELOGIC
®
control equation setting ER asserts to
logical 1 (in Report settings)
➤ The device receives the serial port command TRI (Trigger Event
Reports)
Programmable SELOGIC Control Equation Setting ER
Enter up to 15 elements (up to 14 nested parentheses) in the programmable
SEL
OGIC control equation event report trigger setting ER to trigger event reports
(SET R). When any of the elements in the ER equation asserts from a logical 0 to
logical 1, the device generates an event report (if the SEL-2414 is not already
generating a report that encompasses the new transition).
TRI (Trigger Event Report) Command
The sole function of the TRI serial port command is to generate event reports,
primarily for testing purposes. See TRIGGER Command (Trigger Event Report)
on page 7.29 for more information on the TRI (Trigger Event Report) command.
Table 9.1 Compressed ASCII Event Commands
Command Description
CHI Displays Compressed ASCII event history information.
CSU
n Displays Compressed ASCII event summary information.
CEV
n Displays Compressed ASCII event reports.