Schweitzer Engineering Laboratories SEL-421-4, Instruction Manual

Page: 1216 / 1518

14.10
SEL-400 Series Relays Instruction Manual Date Code 20171006
ASCII Command Reference
Command Description
CEV Command Option Combinations
You can combine options C , L , L yyy , n , NSET , NSUM , S x , and TERSE in one
command. Enter the options according to the following guidelines:
➤
The L yyy option overrides the C option
➤
The S x option overrides the L option
➤
Enter the options in any order
Table 14.27 lists the choices you can make in the CEV command. Combine
options on each row, selecting one option from each column, to create a CEV
command.
The following examples illustrate some possible option combinations.
CFG
In TiDL and IEC Sampled Values (SV) subscriber relays, certain aspects of the
relay must be configured before the relay can be set. This command is used to
perform this configuration.
CFG CTNOM
In TiDL and IEC SV subscriber relays, use the CFG CTNOM command to
inform the relay which CT inputs are 1 A nominal and which are 5 A nominal.
(By default, the relay assumes all CT inputs are 5 A nominal.) This is necessary
so the relay scales the information correctly. See
Section 2: Installation of the
product-specific instruction manual for more information on using this command
as part of configuring the relay. This will restart the relay and force all settings to
default, so this command must be made before making any other settings in the
relay.
Table 14.27 CEV Command Option Groups
Acknowledge
Event
Number Data
Resolution Report
Type Report
Length
Omit
ACK n , NEXT S x , L C L yyy , C NSET, NSUM, TERSE
Example Description
CEV L10 S8 Return 10 cycles of an 8-samples/cycle Compressed ASCII event report
for the most recent event.
CEV L10 L Return 10 cycles of an large resolution Compressed ASCII event report
for the most recent event (same as above).
CEV 2 C NSUM
TERSE For the second most recent event, return 15 cycles of the event in Com-
pressed ASCII format with no event summary and no report label lines
with large resolution data.
Table 14.28 CFG CTNOM Command
Command Description Access Level
CFG CTNOM n
a
a
The parameter
n
(or parameters) is relay-specific.
Change nominal CT configuration to selected value 2