Schweitzer Engineering Laboratories SEL-311L, Instruction Manual, Page: 453 / 734

Date Code 20010625 Line Current Differential Communications 10-27
and Serial Port Communications and Commands
SEL-311L Instruction Manual
Because the Password jumper is not in place, the relay asks for the Access Level 1 password to
be entered:
Password: ? @@@@@@
The relay responds:
SEL-311L Date: 10/12/99 Time: 16:22:04.372
EXAMPLE: BUS B, BREAKER 3
Level 1
=>
The “=>” prompt indicates the relay is now in Access Level 1.
If the entered password is incorrect, the relay asks for the password again (Password: ?). The
relay will ask up to three times. If the requested password is incorrectly entered three times, the
relay closes the ALARM contact for one second and remains at Access Level 0 (“=” prompt).
Access Level Attempt (Password Not Required)
Assume the following conditions: Password jumper = ON (in place), Access Level = 0.
At the Access Level 0 prompt, enter the ACC command:
= ACC <ENTER>
Because the Password jumper is in place, the relay does not ask for a password; it goes directly
to Access Level 1. The relay responds:
SEL-311L Date: 10/12/99 Time: 16:22:04.372
EXAMPLE: BUS B, BREAKER 3
Level 1
=>
The “=>” prompt indicates the relay is now in Access Level 1.
The above two examples demonstrate how to go from Access Level 0 to Access Level 1. The
procedure to go from Access Level 1 to Access Level B, Access Level 1 to Access Level 2, or
Access Level B to Access Level 2 is much the same, with command
BAC or 2AC entered at the
access level screen prompt. The relay closes the ALARM contact for one second after a
successful Level B or Level 2 access. If access is denied, the ALARM contact closes for one
second.
CAS Command
The compressed ASCII configuration provides data for an external computer to extract data from
other compressed ASCII commands. For details on this and other Compressed ASCII
commands see
Appendix E: Compressed ASCII Commands .