Schweitzer Engineering Laboratories SEL-387-0 Instruction Manual Download

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7.24

SEL-387-0, -5, -6 Relay

Instruction Manual

Date Code 20050919

Serial Port Communications and Commands

SEL ASCII Protocol Details

The two parameters are required:

➤

specifies the Access Level (1, B, or 2).

➤

newpas

specifies the new password.

Designate which access level password to change with the

= 1, B, or 2. The

new password designated by

newpas

can be up to six characters. The

following example changes the level one password to Ot3579. The passwords
are case sensitive.

=>>

PAS 1 Ot3579 <Enter>

Set
=>>

The relay sets the password, pulses the

ALARM

relay closed for approximately

one second, and transmits the response

Set

to the display.

Passwords can contain up to six characters and include any combination of
letters, numbers, periods, or hyphens. Upper- and lowercase letters are treated
as different characters. Strong passwords consist of six characters, with at
least one special character or digit and mixed case sensitivity, but do not form
a name, date, acronym, or word. Passwords formed in this manner are less
susceptible to password guessing and automated attacks. Examples of valid,
distinct strong passwords include:

Ot3579 A24.68 Ih2dcs 4u-Iwg .0387.

After entering new passwords, type

PAS <Enter>

to inspect them. Make sure

they are what you intended, and record the new passwords.

If the passwords are lost or you want to operate the relay completely without
password protection, install main board jumper JMP6A. With no password
protection, you can gain access without knowing the passwords, and view or
change active passwords and settings.

PUL n (Pulse)

Access Levels B, 2

The

PULSE

n k

command asserts the selected output contact

for

seconds.

The

parameter is optional. If

is not specified, the output contact is pulsed

for 1 second. Main board breaker jumper JMP6B must be in place. After
issuing the

PULSE

command, the relay asks for confirmation of the

operation, and then asks if you are sure. An invalid output contact name or
incorrect

value produces an error message.

Parameter

can be any existing output contact element name such as

OUT107

Parameter

must be a number ranging from 1 to 30 seconds.

=>>

PUL OUT107 3 <Enter>

Pulse contact OUT107 for 3 second(s) (Y/N) ?

Y <Enter>

Are you sure (Y/N) ?

Y <Enter>

=>>

QUI (Quit)

Access Levels 0, 1, B, 2

The

QUIT

command returns the relay to Access Level 0 from Level 1, B,

or 2. The command displays the relay settings RID, TID, date, and time of

QUIT

command execution.

NOTE:

If newpas is

DISABLE

(must be

uppercase), the password prompt and
password protection for the

level are

disabled. The relay responds with

Password Disabled

. This permits

the user to temporarily suspend
password protection, without
installing jumper JMP6A.

NOTE:

The

PUL

command is useful

during testing to verify operation of
output contacts, but it should not be
used while the relay is in service.
During the entire time the specified
output contact is being pulsed, all
other output contacts are frozen in
their existing state and are not
permitted to change. This could
prevent a trip or other critical output
from being issued during the specified
PUL time interval.