7.35
Date Code 20100129 Instruction Manual SEL-751A Relay
Communications
SEL ASCII Protocol and Commands
PULSE Command
Use the PULSE command (see Table 7.35) to pulse any of the relay control
outputs for a specified time. This function aids you in relay testing and
commissioning. If the output is open, the PUL command momentarily closes
the output; if the output is closed, the PUL command momentarily opens the
output. The control outputs are OUTnnn, where nnn represents the 100-
series, 200-series, and 300-series addresses.
QUIT Command
Use the QUIT command (see Table 7.3 6) to revert to Access Level 0.
Access Level 0 is the lowest access level; the SEL-751A performs no
password check to descend to this level (or to remain at this level).
R_S Command (Restore Factory Defaults)
Use the R_S command (see Tab le 7.37) to restore factory default settings.
SER Command (Sequential Events Recorder Report)
Use the SER commands (see Table 7.38 and Table 7.39) to view and manage
the Sequential Events Recorder report. See Section 9: Analyzing Events for
further details on SER reports.
Ta b le 7 . 3 5 P U L O U T
nnn
Command
Command Description Access Level
PUL OUTnnn
a
a
Parameter
nnn
is a control output number.
Pulse output OUTnnn for 1 second. 2
PUL OUTnnn s
b
b
Parameter
s
is time in seconds, with a range of 1–30.
Pulse output OUTnnn for s seconds. 2
Ta b le 7 . 3 6 QU I T Co m m a n d
Command Description Access Level
QUIT Go to Access Level 0. 0
Table 7.37 R_S Command (Restore Factory Defaults)
Command Description Access Level
R_S Restore the factory default settings and passwords
and reboot the system.
a
a
Only available after a settings or critical RAM failure.
2
Table 7.38 SER Command (Sequential Events Recorder Report)
Command Description Access Level
SER Use the SER command to display a chronological
progression of all available SER rows (up to
1024 rows). Row 1 is the most recently triggered
row and row 1024 is the oldest.
1
SER C or R Use this command to clear/reset the SER records. 1
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