8-20 Serial Port Communications and Commands Date Code 20010731
SEL-352-1, -2 Instruction Manual
EVE A 3 S8 Display
Event number 3
VY analogs, alternate digitals
8 samples per cycle
All available cycles
EVE S8 L5 10 Display
Event number 10
VX and I analogs, standard digitals
8 samples per cycle
First 5 cycles of the event
The n parameter specifies the event number to display based on the HISTORY command. The
HIS command displays an event summary of all of the events stored in memory. Each summary
is numbered. The number of event reports stored is dependent on the length of the events, which
is determined by the SET G setting LER as follows:
LER Setting
Number of Event Reports Stored
15 cycles 40
30 cycles 20
60 cycles 10
To select one of the events stored in relay memory, enter the EVENT command with a number,
with 1 being the newest event recorded. If no event report is selected, the relay defaults to n = 1
to display the newest event report. Type EVE 9 <ENTER> to display event number 9.
Include the A as a parameter to display the alternate Y-side voltages and an alternate set of
digital channels. If the A is not specified, the standard X-side voltages and currents with the
standard digitals are displayed.
Specify the number of samples per-cycle resolution of the event with the Ss parameter. The
small s can be 4, 8, 16, or 64. If the Ss parameter is not specified, the relay defaults to S4. The
relay stores the event with 64-samples-per-cycle resolution. When displaying the event, select
the most appropriate resolution for your application. Some recommendations follow:
Overview of relay operation: S4 (provides quickest display of general information)
Diagnostics using digital channels: S8 (the digital channels are processed every eighth
cycle)
Best resolution for SEL-2020/SEL-2030 event storage: S16 (largest event size the
SEL-2020/SEL2030 can store)
Detailed analysis of analog channels: S64 (analog channels are sampled every 64th
cycle)
To specify the length of the event displayed, use the Lc parameter. The c can be any integer
from 1 to LER in cycles. If the LER is set to 30, then L30 is the largest value that may be
entered. If the Lc parameter is not specified, the relay defaults to the LER setting. Any attempt
to enter a length greater than the LER setting will produce an error.
Refer to Event Reports in Section 10: Event Reports and SER for example event reports and
descriptions.
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