Schweitzer Engineering Laboratories SEL-2020 - SET U Settings

Date Code 20010518 Settings 6-31
SEL-2020 Instruction Manual
For example, assume you have made the following settings. See Section 8: Message Strings for
an explanation of the special characters used in these settings.
TRANS =
"TR\Pa/"
TRANSACK =
"\006"
TRANSNACK =
"\015"
To enter transparent mode with another SEL-2020
port, use the message format you defined with the
TRANS command. For example, to enter transparent
mode with Port 5 with these settings, issue the
command TR05<ENTER>. If the transparent
connection is successful, the SEL-2020 will respond
with 06h (ASCII ACK) and you will be transparently
connected. To terminate the transparent connection,
use the transparent disconnect sequence you set using
SET P. If the transparent connection could not be
established, the SEL-2020 will respond with 15h
(ASCII NACK).
READ =
"RD\Pa/@\Aa/"
READACK =
"RP\Dh/"
READNACK = ""
To read data from the SEL-2020 database, use the
message format you defined with the READ command.
To read from Port 7's database at address 1001h with
these settings, send the command
RD07@1001<ENTER>. The SEL-2020 will respond
with the data if the read is successful (e.g., RP0013).
If the read cannot be performed, the SEL-2020 will not
respond, because there is no response defined
(READNACK) in these settings.
WRITE =
"WR\Pa/@\Aa/=\D
h/"
WRITEACK =
"OK"
WRITENACK =
"FAIL"
To write data to the SEL-2020 database, use the
message format you have defined with the WRITE
command. To write 0036h to Port 11's database at
address D007h with these settings, send the message
WR0B@D007=0036<ENTER> to the SEL-2020. The
SEL-2020 will respond “OK” if successful, or “FAIL”
if the write could not be performed.
This example uses ASCII commands, but these commands could also have been built as binary
commands.
SET U Settings
The SET U command will prompt you for user-defined strings and the command you want to use
to trigger a response on Master, SEL IED, and other IED ports. SET U is not applicable to
printer ports. You can also use the SET U command to disable the SEL-2020 command set on
Master ports. Table 6.12 and
Table 6.13 show the prompts you will see with the SET U command. includes detailed
information about the SET U settings.