D-10 Configuration,
Fast Meter,
and
Fast Operate
Commands Date Code 20080110
SEL-387E Instruction Manual
A5ED
Fast Operate
Reset Command
The Fast Operate Reset commands take the following form:
Data
Description
A5ED Command
06 Message length—always 6
00 Operate Code (e.g., "00 for target reset, "TAR R")
00 Operate Validation—(4 + Operate Code) +1
1-byte Checksum
ID Command
In response to the ID command, the relay sends the firmware ID, the relay TID setting, and the
Modbus device code, as described below.
<STX> (STX character, 02)
"FID STRING ENCLOSED IN QUOTES","yyyy"<CR>
"THE CHECKSUM OF THE ROM CODE","yyyy"<CR>
"THE TERMINAL ID AS SET BY THE TID SETTING","yyyy"<CR>
"DEVCODE=42","yyyy"<CR>
"PARTNO=0387EXXXXXXXXXp","yyyy"<CR>
"CONFIG=111100","0387"<CR>
<ETX> (ETX character, 03)
where yyyy is the 4-byte ASCII representation of the hex checksum for the line.
42 is the device code used by the SEL-2020 to identify the relay to Modbus users.
PARTNO reports the part number. The last digit of the part number (p) indicates
whether the firmware supports DNP communication or not. For p = 1, the
communications protocol will be Standard plus DNP3 Level 2 Slave; for p = X, it will
be Standard with no DNP.
DNA Command
In response to the DNA command, the relay sends names of the Relay Word bits, as described
below:
<STX> (STX character, 02)
"xxxxxx","xxxxxx","xxxxxx","xxxxxx","xxxxxx","xxxxxx","xxxxxx","xxxxxx","yyyy"<CR>
... (49 more, where xxxxxx is a relay word element name)
<ETX> (ETX character, 03)
where xxxxxx are each name in ASCII. "*" indicates an unused bit position. The labels shall
appear in order from Most Significant Bit (MSB) to Least Significant Bit (LSB).
yyyy is the 4-byte ASCII representation of the hex checksum for the line.
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