7.44
SEL-751 Relay Instruction Manual Date Code 20170927
Communications
Communications Protocols
When setting EN_LRC := Y, the Relay Word bit LOCAL supervises the OPE
command (see Table 9 .4). If the LOCAL bit is asserted (LOCAL = 1), the
relay does not execute the OPE command and responds with the following:
The Relay Word bit LOCAL is determined by the LOCAL SEL
OGIC control
equation (see Table 9.4).
PASSWORD Command (Change Passwords)
Use the PAS command (see Tab le 7.33) to change existing passwords.
The factory-default passwords are as shown in Table 7.34.
To change the password for Access Level 1 to #Ot3579!ijd7, enter the
following command sequence:
Similarly, use PAS 2 to change Level 2 passwords and PAS C to change
Level C passwords.
=>>OPE <Enter>
Command Aborted: Device in Local Control
=>>
Table 7.33 PASSWORD Command
Command Description Access Level
PAS level Changes password for Access Level level.2, C
Parameter
level Represents the relay Access Levels 1, 2, or C.
Table 7.34 Factory-Default Passwords for Access Levels 1, 2, and C
Access Level Factory-Default Password
1 OTTER
2TAIL
CCLARKE
=>>PAS 1 <Enter>
Old PW: ? ***** <Enter>
New PW: ? *********** <Enter>
Confirm PW: ? *********** <Enter>
Password Changed
=>>
Table 7.35 Valid Password Characters
Alpha
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
a b c d e f g h i j k l m n o p q r s t u v w x y z
Numeric
0 1 2 3 4 5 6 7 8 9
Special
! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~
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.