5.25
Date Code 20110408 Instruction Manual SEL-551 Relay
Serial Port Communications and Commands
Command Explanations
To pulse OUT1 for five seconds:
=>>PUL OUT1 5 <Enter>
Are you sure (Y/N) ? Y <Enter>
=>>
If the response to the Are you sure (Y/N) ? prompt is N or n, the command is
aborted.
The PUL command is supervised by the main board breaker jumper, JMP24. If
JMP24 is not in place (jumper JMP24 = off), the relay does not accept the PUL
command and responds:
Aborted: No Breaker Jumper
The relay generates an event report if the OUT1, OUT2, OUT3, or OUT4 contact is
pulsed.
The response of a programmable alarm output contact to a PULSE command
is discussed in the Output Contacts on page 3.39.
SET Command
The SET command allows the user to view or change the relay settings (see
Table 4.1).
VER Command (Show Relay Configuration and Firmware Version)
The VER command provides relay configuration and information such as
nominal current input ratings.
An SEL-551 example printout of the VER command follows:
=>>VER <Enter>
FID=SEL-551-R500-Vf-Z001001-D20050124
CID=D07F
Part Number: 055100BX5X4X
SELboot:
BFID=SLBT-500-R100-V0-Z001001-D20050124
Checksum: 3EB5
Mainboard:
Code FLASH Size: 256 kB
Data FLASH Size: 128 kB
RAM Size: 128 kB
EEPROM Size: 8 kB
Front Panel: Installed
Analog Inputs:
Currents: 5 Amp Phase
Currents: 5 Amp Neutral
Interface Boards:
None
Communications:
Rear Port: EIA-485
Extended Relay Features:
If above information is unexpected,
contact SEL for assistance
=>>
where:
X = OUT1, OUT2, OUT3, OUT4, or ALARM
Y = the pulse duration (1–30) in seconds. If Y is not specified,
the pulse duration defaults to one second
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