7.28
SEL-387-0, -5, -6 Relay Instruction Manual Date Code 20170601
Serial Port Communications and Commands
SEL ASCII Protocol Details
The settings for each communication port are:
Refer to Section 6: Setting the Relay for all default settings and setting
worksheets.
SET R (Edit SER Settings)
Access Level 2
Configure the Sequential Events Recorder settings using the SET R
command. The settings are the four sequential events recorder trigger
conditions (SER1 to SER4) and the ALIAS1 to ALIAS20 settings for re-
naming Relay Word bits for the SER report. The entire syntax of the SET R
command follows:
SET R Setting TERSE <Enter>
The two parameters are optional and perform the following functions:
➤ Setting specifies the setting name with which to begin. The
default is the first setting.
➤ TERSE eliminates the display of the new settings at the end of
the setting procedure. The command will function properly if
just TE is entered, instead of the full word.
The SET R procedure works just like the SET procedure. Table 7.6 lists the
editing keys that you can use with the SET command.
Refer to Section 6: Setting the Relay for setting worksheets. Refer to
Section 9: Event Reports and SER for more details on default settings and data
retrieval.
Table 7.7 Settings for Each Communication Port
PROTO
protocol can be SEL, LMD, DNP, RTDA, or RTDB.
PREFIX
If PROTO is LMD, prefix can be @, #, $, %, or &.
ADDR
If PROTO is LMD, ADDR can be any integer 1 through 99.
SETTLE
If PROTO is LMD, the settling time can be 0 to 30 seconds.
SPEED
baud can be set to 300, 1200, 2400, 4800, 9600, or 19200.
BITS
data can be 7 or 8 bits.
PARITY
can be O, E, or N (Odd, Even, None).
STOP
bits can be 1 or 2.
T_OUT
port inactivity time-out can be 0 through 30 minutes.
T_OUT = 0 setting means port will never time out.
Time-out returns port to Access Level 0.
AUTO
send auto messages to the port; Yes or No.
RTSCTS
enable hardware handshaking; Yes or No (only if PROTO = SEL).
FASTOP
enable Fast Operate function; Yes or No.
NOTE: Make Sequential Events
Recorder (SER) Settings With Care.
The relay triggers a row in the
Sequential Events Recorder (SER)
event report for any change of state in
any one of the elements listed in the
SER1, SER2, SER3, or SER4 trigger
settings. Nonvolatile memory is used
to store the latest 512 rows of the SER
event report so they can be retained
during power loss. The nonvolatile
memory is rated for a finite number of
"writes." Exceeding the limit can
result in an EEPROM self-test failure.
An average of 1 state change every
3 minutes can be made for a 25-year
relay service life.
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