Schweitzer Engineering Laboratories SEL-167D, Instruction Manual

Page: 59 / 123

5. Control characters can be sent from most keyboards using the following keystrokes:
COMMAND CHARACTERISTICS
The relay responds to commands sent to either serial communications interface. A two-level
password system provides security against unauthorized access.
When the relay is first turned on, the instrument is in Access Level 0 and honors only the
ACCESS command. It responds
"
Invalid command
"
or
"
Invalid access level
"
to any other
entries.
Most commands may be used in Access Level 1, which is entered with the ACCESS
command and the first password. This password is factory-set to OTTER, and may be
changed with the PASSWORD command (Access Level 2).
Critical functions such as circuit breaker control and changing settings may be executed only
from Access Level 2. You may enter Access Level 2 using the 2ACCESS command and the
second password. The Level 2 password is factory-set to TAIL, and may be changed with the
PASSWORD command.
XON:
< C O N T R O L > Q
XOFF:
< C O N T R O L > S
CAN:
< C O N T R O L > X
(hold down the Control key and press Q)
(hold down the Control key and press S)
(hold down the Control key and press X)
Startup
After the relay is turned on, the instrument transmits the following message to the port
designated as the
"
automatic
"
port:
You should also hear the ALARM relay pull in, opening its
"
b
"
contact. The instrument is
shipped with PORT 2 designated as the automatic port; you may use the SET command and
the AUTO setting to select either PORT 1, 2, or both for the transmission of automatic
responses from the SEL-267D relay (see SET command).
3-4 Commands and Serial Communication
SEL-267D/167D Instruction Manual
Date Code 920326