5.11
Date Code 20110408 Instruction Manual SEL-551 Relay
Serial Port Communications and Commands
Command Explanations
The serial port command explanations that follow in Command Explanations
on page 5.11 are in the same order as the commands listed in Table 5.4.
Command Explanations
Access Level 0
Commands
ACC, 2AC, and CAL Commands (Access)
The access commands allow entry to the next higher access levels. Different
commands are available at the different access levels (see Table 5 .4).
Password Requirements
Passwords are required if the main board password jumper JMP22 is not in
place (JMP22 = OFF). Passwords are not required if the main board password
jumper JMP22 is in place (JMP22 = ON). See Password and Breaker Jumpers
on page 2.16. See PAS Command (Password) for more information on
passwords.
Access Level Attempt (Password Required). Assume the following
conditions exist:
➤ main board password
➤ jumper JMP22 = off (passwords required to enter higher access
levels)
➤ Access level = 0 (prompt =)
Date:
This is the date the command response was given [except for relay
response to the EVE command (Event), where it is the date the
event occurred].
You can modify the date display format (Month/Day/Year or Year/
Month/Day) by changing the DATE_F relay setting.
Time:
This is the time the command response was given (except for relay
response to the EVE command, where it is the time the event
occurred).
Relay Response Definition
Table 5.5 ACC and 2AC Commands
Access Level Prompt
Corresponding
Serial Port
Command
Password Level
a
Brief Command Description
0
=
ACC 1 Access—allows entry to Access Level 1
1
=>
2AC 2 2Access—allows entry to Access Level 2
2
=>>
CAL C CAccess—allows entry to Access Level C
a
If the main board password jumper JMP22 is not in place (JMP22 = OFF), then passwords have to be entered when access level attempts
are made.
If the main board password jumper is in place (JMP22 = ON), then passwords do not have to be entered when access level attempts are made.
See PAS Command (Password) on page 5.23 for more information.
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