7.27
Date Code 20081022
Instruction Manual
SEL-787 Relay
Communications
SEL ASCII Protocol and Commands
OPEN
n
Command (Open Breaker
n
, where n = 1 or 2)
The
OPE
n
(OPEN) command asserts Relay Word bit OC
n
for 1/4 cycle when
it is executed. Relay Word bit OC
n
can then be programmed into the TR
n
SEL
OGIC
control equation to assert the TRIP
n
Relay Word bit, which in turn
asserts an output contact (e.g., OUT301 = TRIP
n
) to open circuit breaker
n
(see
for factory default setting TR
n
and trip logic).
To issue the
OPE 1
command, enter the following.
=>>
OPE 1
<Enter>
Open Breaker1 (Y,N)?
Y <Enter>
=>>
Typing
N <Enter>
after the above prompt will abort the command.
The
OPE
n
command is supervised by the main board Breaker jumper (see
). If the Breaker jumper is not in place (Breaker jumper = OFF), the
relay does not execute the
OPE
n
command and responds with the following.
=>>
OPE 1 <Enter>
Command Aborted: No Breaker Jumper
=>>
PASSWORD Command (Change Passwords)
Use the
PAS
command (see
and
) to change existing
passwords.
The factory default passwords are as shown in
.
To change the password for Access Level 1 to #Ot3579!ijd7, enter the
following command sequence:
=>>
PAS 1 <Enter>
New PW: ?
*********** <Enter>
Confirm PW: ?
*********** <Enter>
Password Changed
=>>
Similarly, use
PAS 2
to change Level 2 passwords.
Table 7.31
PASSWORD Command
Command
Description
Access Level
PAS
level
Change password for Access Level
level
.
2
Table 7.32
PAS Command Format
Parameter
Description
level
Parameter
level
represents the relay Access Levels 1 or 2.
Table 7.33
Factory Default Passwords for Access Levels 1 and 2
Access Level
Factory Default Password
1
OTTER
2
TAIL
This device is shipped with default
passwords. Default passwords should
be changed to private passwords at
installation. Failure to change each
default password to a private
password may allow unauthorized
access. SEL shall not be responsible
for any damage resulting from
unauthorized access.
!
WARNING
Summary of Contents for SEL-787
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