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 OCn for 1/4 cycle when
it is executed. Relay Word bit OCn can then be programmed into the TRn
SEL
OGIC control equation to assert the TRIPn Relay Word bit, which in turn
asserts an output contact (e.g., OUT301 = TRIPn) to open circuit breaker n
(see Table 4.24 and Figure 4.44 for factory default setting TRn 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
Table 2.9). 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 Table 7.31 and Table 7.32) to change existing
passwords.
The factory default passwords are as shown in Table 7.33.
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 Fa ctor y D efa ult Pas sword
1 OTTER
2TAIL
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