Date Code 20010518 Settings 6-27
SEL-2020 Instruction Manual
Table 6.11: SET A Automatic Message Settings Information (continued)
Setting Comment
ARCH_EN
Prompt. Enable use of archive data items (Y/N).
Description. You enter Y (Yes) to enable use of nonvolatile memory. ARCH_EN is
forced to N (No) if nonvolatile Flash memory is not installed. Not available for printer
ports.
ISSUE1A-3A
Prompt. Archive 1 to 3 trigger.
Description. You define the trigger condition as a SEL
OGIC Control Equation that initiates
a message. This setting available only if ARCH_EN is set to Y (Yes).
MESG1A-3A
Prompt. Archive 1 to 3 message.
Description. You enter the message to send in response to the associated trigger
condition. This setting available only if ARCH_EN is set to Y (Yes).
PARSE1A-3A
Prompt. Archive 1 to 3 response parsing method (0=IGNORE,
1=ASCII_INT, 2=ASCII_FLOAT, 3=CHAR_STRING,
4=INT_STRING, 5=INT_STRX).
Description. You select the parsing option to be used for the message response.
This setting available only if ARCH_EN is set to Y (Yes). Parsing is
automatically set for SEL IEDs if string is a recognized “20” command.
NUM1A-3A
Prompt. Archive 1 to 3 number of data items.
Description. You enter the maximum number of data items the SEL-2020 may
store from the response.
DELAY1A-3A
Prompt: Archive 1 to 3 time delay to allow response to complete (OFF, ON).
Description. If you know you are collecting the entire response, use the OFF
setting to avoid unnecessary delays. Otherwise, use the ON setting so the
response does not confuse subsequent data collections.
CHECK1A-3A
Prompt. Checksum verification (N=NONE, 8A=8BIT ASCII, 8B=8BIT Binary,
16A=16BIT ASCII, 16B=16BIT Binary, CA=CRC16 ASCII, CB=CRC16 Binary).
Description. You select the verification method you wish to use to confirm that
the data was accurately transmitted over the data channel. The data must contain a
validation code of this same type and format. Otherwise, select NONE.
ORDER1A-3A
Prompt. Checksum byte order(H=High byte first, L=Low byte first)
Description. You enter the ordering of the bytes in the received validation code.
Does not apply to 8-bit (single-byte) checksums.
START1A-3A
Prompt. Position or character where verification will start.
Description. You enter the position in the received data where the checksum
validation should begin. This position can be an index from the start, an index
from the end, or a specific character.
STOP1A-3A
Prompt. Position or character where verification will stop.
Description. You enter the position in the received data where the checksum
validation should end. This position can be an index from the start, an index from
the end, or a specific character.
CHKPOS1A-3A
Prompt. Position or character where checksum located.
Description. You enter the position in the received data where the validation code
will be located. This position can be an index from the start, an index from the
end, or a specific character.
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